diff --git a/.github/workflows/build_wheels_linux.yml b/.github/workflows/build_wheels_linux.yml
index 526049ff..98ad3dc8 100644
--- a/.github/workflows/build_wheels_linux.yml
+++ b/.github/workflows/build_wheels_linux.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - 3.4
     paths-ignore:
       - '.github/workflows/build_wheels_linux_arm.yml'
       - '.github/workflows/build_wheels_windows*'
@@ -14,21 +15,18 @@ on:
 
 jobs:
   build:
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-20.04
     defaults:
       run:
         shell: bash
-
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ['3.6']
         platform: [x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [0]
-
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: true
       REPO_DIR: .
@@ -37,64 +35,93 @@ jobs:
       MB_PYTHON_VERSION: ${{ matrix.python-version }}
       TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}
       MB_ML_VER: 2014
-      NP_TEST_DEP: numpy==1.19.4
       TRAVIS_BUILD_DIR: ${{ github.workspace }}
       CONFIG_PATH: travis_config.sh
-      DOCKER_IMAGE: quay.io/skvark/manylinux2014_${PLAT}
-      USE_CCACHE: 1
+      DOCKER_IMAGE: quay.io/opencv-ci/opencv-python-manylinux2014-x86-64:20220628
+      USE_CCACHE: 0
       UNICODE_WIDTH: 32
+      PLAT: x86_64
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
-
     steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
     - name: Update submodules
       if: github.event_name == 'pull_request'
       run: git submodule update --remote
-
-    - name: Setup Environment variables
-      run: |
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "TRAVIS_EVENT_TYPE=cron" >> $GITHUB_ENV; else echo "TRAVIS_EVENT_TYPE=${{ github.event_name }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "BUILD_COMMIT=master" >> $GITHUB_ENV; else echo "BUILD_COMMIT=$BUILD_COMMIT" >> $GITHUB_ENV; fi
-        if [ "x64" == "${{ matrix.platform }}" ]; then echo "PLAT=x86_64" >> $GITHUB_ENV; fi
-        echo "BUILD_DEPENDS=$(echo $NP_BUILD_DEP)" >> $GITHUB_ENV;
-        echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV;
-
-    - name: build
+    - name: Build a package
       run: source scripts/build.sh
-
-    - name: install and test
-      run: source scripts/install.sh
-
-    - name: saving artifacts
+    - name: Saving all wheels
       uses: actions/upload-artifact@v2
       with:
         name: wheels
         path: wheelhouse/opencv*.whl
+    - name: Saving a wheel accordingly to matrix
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/opencv*.whl
 
+  test:
+    needs: [build]
+    runs-on: ubuntu-20.04
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        platform: [x64]
+        with_contrib: [0, 1]
+        without_gui: [0, 1]
+        build_sdist: [0]
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+      MB_PYTHON_VERSION: ${{ matrix.python-version }}
+      NP_TEST_DEP: numpy==1.19.4
+      NP_TEST_DEP_LATEST: numpy==1.21.2
+      CONFIG_PATH: travis_config.sh
+      PLAT: x86_64
+    steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+        fetch-depth: 0
+    - name: Setup Environment variables
+      run: if [ "3.10" == "${{ matrix.python-version }}" ]; then echo "TEST_DEPENDS=$(echo $NP_TEST_DEP_LATEST)" >> $GITHUB_ENV; else echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV; fi
+    - name: Download a wheel accordingly to matrix
+      uses: actions/download-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/
+    - name: Package installation and run tests
+      run: source scripts/install.sh
 
   build_sdist:
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-20.04
     defaults:
       run:
         shell: bash
-
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
         python-version: [3.8]
         platform: [x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [1]
-
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: true
       REPO_DIR: .
@@ -107,50 +134,41 @@ jobs:
       NP_TEST_DEP: numpy==1.19.4
       TRAVIS_BUILD_DIR: ${{ github.workspace }}
       CONFIG_PATH: travis_config.sh
-      DOCKER_IMAGE: quay.io/skvark/manylinux2014_${PLAT}
+      DOCKER_IMAGE: quay.io/opencv-ci/opencv-python-manylinux2014-x86-64:20220628
       USE_CCACHE: 1
       UNICODE_WIDTH: 32
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui || 0 }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib || 0 }}
-
     steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
     - name: Update submodules
       if: github.event_name == 'pull_request'
       run: git submodule update --remote
-
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
         architecture: ${{ matrix.platform }}
-
-    - name: Setup Environment variables
-      run: |
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "TRAVIS_EVENT_TYPE=cron" >> $GITHUB_ENV; else echo "TRAVIS_EVENT_TYPE=${{ github.event_name }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "BUILD_COMMIT=master" >> $GITHUB_ENV; else echo "BUILD_COMMIT=$BUILD_COMMIT" >> $GITHUB_ENV; fi
-        echo "BUILD_DEPENDS=$(echo $NP_BUILD_DEP)" >> $GITHUB_ENV;
-        echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV;
-
-    - name: before install
+    - name: Build a package
       run: |
         set -e
         # Build and package
         set -x
           python -m pip install --upgrade pip
           python -m pip install scikit-build
-          python setup.py sdist
+          python setup.py sdist --formats=gztar
         set +x
         # Install and run tests
         set -x
         echo "skipping tests because of sdist"
-
     - name: saving artifacts
       uses: actions/upload-artifact@v2
       with:
@@ -159,8 +177,8 @@ jobs:
 
   test_release_opencv_python:
     if: github.event_name == 'release' && github.event.release.prerelease
-    needs: [build, build_sdist]
-    runs-on: ubuntu-latest
+    needs: [build, build_sdist, test]
+    runs-on: ubuntu-20.04
     environment: test-opencv-python-release
     defaults:
       run:
@@ -170,7 +188,6 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload all wheels
         run: |
           python -m pip install twine
@@ -178,8 +195,8 @@ jobs:
 
   release_opencv_python:
     if: github.event_name == 'release' && !github.event.release.prerelease
-    needs: [build, build_sdist]
-    runs-on: ubuntu-latest
+    needs: [build, build_sdist, test]
+    runs-on: ubuntu-20.04
     environment: opencv-python-release
     defaults:
       run:
@@ -189,22 +206,18 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload wheels for opencv_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_python-* wheelhouse/opencv-python-[^h]*
-
       - name: Upload wheels for opencv_contrib_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_CONTRIB_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_CONTRIB_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_contrib_python-* wheelhouse/opencv-contrib-python-[^h]*
-
       - name: Upload wheels for opencv_python_headless
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_HEADLESS_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_HEADLESS_PASSWORD }} --skip-existing wheelhouse/opencv_python_headless-* wheelhouse/opencv-python-headless-*
-
       - name: Upload wheels for opencv_contrib_python_headless
         run: |
           python -m pip install twine
diff --git a/.github/workflows/build_wheels_linux_arm.yml b/.github/workflows/build_wheels_linux_arm.yml
index d71db231..4d0c3daf 100644
--- a/.github/workflows/build_wheels_linux_arm.yml
+++ b/.github/workflows/build_wheels_linux_arm.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - 3.4
     paths-ignore:
       - '.github/workflows/build_wheels_linux.yml'
       - '.github/workflows/build_wheels_windows*'
@@ -14,21 +15,18 @@ on:
 
 jobs:
   build_arm:
-    runs-on: ${{ matrix.os }}
+    runs-on: opencv-cn-lin-arm64
     defaults:
       run:
         shell: bash
-
     strategy:
       fail-fast: false
       matrix:
-        os: [ARM64]
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ['3.6']
         platform: [x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [0]
-
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: true
       REPO_DIR: .
@@ -38,50 +36,84 @@ jobs:
       TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}
       PLAT: aarch64
       MB_ML_VER: 2014
-      NP_TEST_DEP: numpy==1.19.4
       TRAVIS_BUILD_DIR: ${{ github.workspace }}
       CONFIG_PATH: travis_config.sh
-      DOCKER_IMAGE: quay.io/skvark/manylinux2014_${PLAT}
-      DOCKER_TEST_IMAGE: multibuild/xenial_arm64v8
+      DOCKER_IMAGE: quay.io/opencv-ci/opencv-python-manylinux2014-aarch64:20220628
       USE_CCACHE: 0
       UNICODE_WIDTH: 32
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
-
     steps:
+    - name: UID
+      run: id -u
     - name: Cleanup
-      if: always()
-      uses: AutoModality/action-clean@v1
-
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
-    - name: Setup Environment variables
-      run: |
-        if [ "ARM64" == "${{ matrix.os }}" ]; then echo "PLAT=aarch64" >> $GITHUB_ENV; fi
-        echo "BUILD_DEPENDS=$(echo $NP_BUILD_DEP)" >> $GITHUB_ENV;
-        echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV;
-
-    - name: build
+    - name: Build a package
       run: source scripts/build.sh
-
-    - name: install and test
-      run: source scripts/install.sh
-
-    - name: saving artifacts
+    - name: Saving all wheels
       uses: actions/upload-artifact@v2
       with:
         name: wheels
         path: wheelhouse/opencv*.whl
+    - name: Saving a wheel accordingly to matrix
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/opencv*.whl
+
+  test:
+    needs: [build_arm]
+    runs-on: opencv-cn-lin-arm64
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        platform: [x64]
+        with_contrib: [0, 1]
+        without_gui: [0, 1]
+        build_sdist: [0]
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+      MB_PYTHON_VERSION: ${{ matrix.python-version }}
+      PLAT: aarch64
+      NP_TEST_DEP: numpy==1.19.4
+      NP_TEST_DEP_LATEST: numpy==1.21.4
+      CONFIG_PATH: travis_config.sh
+      DOCKER_TEST_IMAGE: multibuild/focal_arm64v8
+      UNICODE_WIDTH: 32
+    steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+        fetch-depth: 0
+    - name: Setup Environment variables
+      run: if [ "3.10" == "${{ matrix.python-version }}" ]; then echo "TEST_DEPENDS=$(echo $NP_TEST_DEP_LATEST)" >> $GITHUB_ENV; else echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV; fi
+    - name: Download a wheel accordingly to matrix
+      uses: actions/download-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/
+    - name: Package installation and run tests
+      run: source scripts/install.sh
 
   test_release_opencv_python:
     if: github.event_name == 'release' && github.event.release.prerelease
-    needs: [build_arm]
-    runs-on: ubuntu-latest
+    needs: [build_arm, test]
+    runs-on: ubuntu-20.04
     environment: test-opencv-python-release
     defaults:
       run:
@@ -91,7 +123,6 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload all wheels
         run: |
           python -m pip install twine
@@ -99,8 +130,8 @@ jobs:
 
   release_opencv_python:
     if: github.event_name == 'release' && !github.event.release.prerelease
-    needs: [build_arm]
-    runs-on: ubuntu-latest
+    needs: [build_arm, test]
+    runs-on: ubuntu-20.04
     environment: opencv-python-release
     defaults:
       run:
@@ -110,22 +141,18 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload wheels for opencv_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_python-*
-
       - name: Upload wheels for opencv_contrib_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_CONTRIB_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_CONTRIB_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_contrib_python-*
-
       - name: Upload wheels for opencv_python_headless
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_HEADLESS_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_HEADLESS_PASSWORD }} --skip-existing wheelhouse/opencv_python_headless-*
-
       - name: Upload wheels for opencv_contrib_python_headless
         run: |
           python -m pip install twine
diff --git a/.github/workflows/build_wheels_macos.yml b/.github/workflows/build_wheels_macos.yml
index 5b2b8066..af892101 100644
--- a/.github/workflows/build_wheels_macos.yml
+++ b/.github/workflows/build_wheels_macos.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - 3.4
     paths-ignore:
       - '.github/workflows/build_wheels_linux*'
       - '.github/workflows/build_wheels_windows*'
@@ -18,17 +19,26 @@ jobs:
     defaults:
       run:
         shell: bash
-
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest]
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        os: [macos-10.15, macos-11]
+        python-version: ['3.6']
         platform: [x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [0]
-
+        exclude:
+          - os: macos-10.15
+            python-version: '3.10'
+          - os: macos-11
+            python-version: '3.6'
+          - os: macos-11
+            python-version: '3.7'
+          - os: macos-11
+            python-version: '3.8'
+          - os: macos-11
+            python-version: '3.9'
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: true
       REPO_DIR: .
@@ -37,45 +47,30 @@ jobs:
       MB_PYTHON_VERSION: ${{ matrix.python-version }}
       TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}
       MB_ML_VER: 2014
-      NP_TEST_DEP: numpy==1.19.4
       TRAVIS_BUILD_DIR: ${{ github.workspace }}
+      TRAVIS_OS_NAME: osx
       CONFIG_PATH: travis_config.sh
-      DOCKER_IMAGE: quay.io/skvark/manylinux2014_${PLAT}
+      DOCKER_IMAGE: quay.io/asenyaev/manylinux2014_${PLAT}
       USE_CCACHE: 1
       UNICODE_WIDTH: 32
+      PLAT: x86_64
+      FFMPEG_FORMULA_VERSION: '@4'
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
-
     steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
     - name: Update submodules
       if: github.event_name == 'pull_request'
       run: git submodule update --remote
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      if: ${{ 'macos-latest' == matrix.os }}
-      with:
-        python-version: ${{ matrix.python-version }}
-        architecture: ${{ matrix.platform }}
-
-    - name: Setup Environment variables
-      run: |
-        if [ "macos-latest" == "${{ matrix.os }}" ]; then echo "TRAVIS_OS_NAME=osx" >> $GITHUB_ENV; else echo "TRAVIS_OS_NAME=${{ matrix.os }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "TRAVIS_EVENT_TYPE=cron" >> $GITHUB_ENV; else echo "TRAVIS_EVENT_TYPE=${{ github.event_name }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "BUILD_COMMIT=master" >> $GITHUB_ENV; else echo "BUILD_COMMIT=$BUILD_COMMIT" >> $GITHUB_ENV; fi
-        if [ "x64" == "${{ matrix.platform }}" ]; then echo "PLAT=x86_64" >> $GITHUB_ENV; fi
-        if [ "x86" == "${{ matrix.platform }}" ]; then echo "PLAT=i686" >> $GITHUB_ENV; fi
-        echo "BUILD_DEPENDS=$(echo $NP_BUILD_DEP)" >> $GITHUB_ENV;
-        echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV;
-
-    - name: before install
+    - name: Build a package
       run: |
         set -e
         # Check out and prepare the source
@@ -92,20 +87,92 @@ jobs:
         echo $ENABLE_HEADLESS > headless.enabled
         set -x
         build_wheel $REPO_DIR $PLAT
-        git submodule update --init --recursive
-        install_run $PLAT
-        set +x
-
-    - name: saving artifacts
+    - name: Saving all wheels
       uses: actions/upload-artifact@v2
       with:
         name: wheels
         path: wheelhouse/opencv*.whl
+    - name: Saving a wheel accordingly to matrix
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/opencv*.whl
+
+  test:
+    needs: [build]
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-10.15, macos-11]
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        platform: [x64]
+        with_contrib: [0, 1]
+        without_gui: [0, 1]
+        build_sdist: [0]
+        exclude:
+          - os: macos-10.15
+            python-version: '3.10'
+          - os: macos-11
+            python-version: '3.6'
+          - os: macos-11
+            python-version: '3.7'
+          - os: macos-11
+            python-version: '3.8'
+          - os: macos-11
+            python-version: '3.9'
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+      MB_PYTHON_VERSION: ${{ matrix.python-version }}
+      NP_TEST_DEP: numpy==1.19.4
+      NP_TEST_DEP_LATEST: numpy==1.21.4
+      CONFIG_PATH: travis_config.sh
+      PLAT: x86_64
+      OPENCV_TEST_DATA_PATH: ${{ github.workspace }}/opencv_extra/testdata
+      PYLINT_TEST_FILE: ${{ github.workspace }}/opencv/samples/python/squares.py
+    steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+        fetch-depth: 0
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: ${{ matrix.platform }}
+    - name: Setup Environment variables
+      run: if [ "3.10" == "${{ matrix.python-version }}" ]; then echo "TEST_DEPENDS=$(echo $NP_TEST_DEP_LATEST)" >> $GITHUB_ENV; else echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV; fi
+    - name: Download a wheel accordingly to matrix
+      uses: actions/download-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/
+    - name: Package installation
+      run: |
+        python -m pip install wheelhouse/opencv*.whl
+        cd ${{ github.workspace }}/tests
+        python get_build_info.py
+    - name: Run tests
+      run: |
+        cd ${{ github.workspace }}/opencv
+        python modules/python/test/test.py -v --repo .
+    - name: Pylint test
+      run: |
+        python -m pip install pylint==2.12.2
+        cd ${{ github.workspace }}/tests
+        python -m pylint $PYLINT_TEST_FILE
 
   test_release_opencv_python:
     if: github.event_name == 'release' && github.event.release.prerelease
-    needs: [build]
-    runs-on: ubuntu-latest
+    needs: [build, test]
+    runs-on: ubuntu-20.04
     environment: test-opencv-python-release
     defaults:
       run:
@@ -115,7 +182,6 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload all wheels
         run: |
           python -m pip install twine
@@ -123,8 +189,8 @@ jobs:
 
   release_opencv_python:
     if: github.event_name == 'release' && !github.event.release.prerelease
-    needs: [build]
-    runs-on: ubuntu-latest
+    needs: [build, test]
+    runs-on: ubuntu-20.04
     environment: opencv-python-release
     defaults:
       run:
@@ -134,22 +200,18 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload wheels for opencv_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_python-*
-
       - name: Upload wheels for opencv_contrib_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_CONTRIB_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_CONTRIB_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_contrib_python-*
-
       - name: Upload wheels for opencv_python_headless
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_HEADLESS_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_HEADLESS_PASSWORD }} --skip-existing wheelhouse/opencv_python_headless-*
-
       - name: Upload wheels for opencv_contrib_python_headless
         run: |
           python -m pip install twine
diff --git a/.github/workflows/build_wheels_macos_m1.yml b/.github/workflows/build_wheels_macos_m1.yml
index d3018497..a1d7c924 100644
--- a/.github/workflows/build_wheels_macos_m1.yml
+++ b/.github/workflows/build_wheels_macos_m1.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - 3.4
     paths-ignore:
       - '.github/workflows/build_wheels_linux*'
       - '.github/workflows/build_wheels_windows*'
@@ -14,62 +15,99 @@ on:
 
 jobs:
   build:
-    runs-on: ${{ matrix.os }}
-
+    runs-on: opencv-cn-mac-arm64
     strategy:
       fail-fast: false
       matrix:
-        os: [macOS-M1]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: ['3.7']
         platform: [x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [0]
-
     env:
+      CI_BUILD: 1
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
-      OPENCV_TEST_DATA_PATH: ${{ github.workspace }}/opencv_extra/testdata
-
     steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
     - name: Update submodules
       if: github.event_name == 'pull_request'
       run: git submodule update --remote
-
-    - name: build script
+    - name: Build a package
       run: |
         git submodule update --init multibuild
         echo $ENABLE_CONTRIB > contrib.enabled
         echo $ENABLE_HEADLESS > headless.enabled
         export MACOSX_DEPLOYMENT_TARGET=11.0
-        arch -arm64 python${{ matrix.python-version }} -m pip wheel --wheel-dir=wheelhouse . --verbose
-    - name: before test
+        arch -arm64 python${{ matrix.python-version }} -m pip install toml && python${{ matrix.python-version }} -c 'import toml; c = toml.load("pyproject.toml"); print("\n".join(c["build-system"]["requires"]))' | python${{ matrix.python-version }} -m pip install -r /dev/stdin
+        arch -arm64 python${{ matrix.python-version }} setup.py bdist_wheel --py-limited-api=cp37 --dist-dir=wheelhouse -v
+        delocate-wheel ${{ github.workspace }}/wheelhouse/opencv*
+    - name: Saving all wheels
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheels
+        path: wheelhouse/opencv*.whl
+    - name: Saving a wheel accordingly to matrix
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/opencv*.whl
+
+  test:
+    needs: [build]
+    runs-on: opencv-cn-mac-arm64-tests
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.7', '3.8', '3.9', '3.10']
+        platform: [x64]
+        with_contrib: [0, 1]
+        without_gui: [0, 1]
+        build_sdist: [0]
+    env:
+      OPENCV_TEST_DATA_PATH: ${{ github.workspace }}/opencv_extra/testdata
+      PYLINT_TEST_FILE: ${{ github.workspace }}/opencv/samples/python/squares.py
+    steps:
+    - name: Cleanup
+      run: find . -mindepth 1 -delete
+      working-directory: ${{ github.workspace }}
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+        fetch-depth: 0
+    - name: Download a wheel accordingly to matrix
+      uses: actions/download-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}
+        path: wheelhouse/
+    - name: Package installation
       run: |
-        git submodule update --init --recursive
         arch -arm64 python${{ matrix.python-version }} -m pip install --user --no-cache --force-reinstall wheelhouse/opencv*.whl
         cd ${{ github.workspace }}/tests
         arch -arm64 python${{ matrix.python-version }} get_build_info.py
-    - name: run test
+    - name: Run tests
       run: |
         cd ${{ github.workspace }}/opencv
         arch -arm64 python${{ matrix.python-version }} modules/python/test/test.py -v --repo .
-    - name: saving artifacts
-      uses: actions/upload-artifact@v2
-      with:
-        name: wheels
-        path: wheelhouse/opencv*.whl
+    - name: Pylint test
+      run: |
+        arch -arm64 python${{ matrix.python-version }} -m pip install pylint==2.12.2
+        cd ${{ github.workspace }}/tests
+        arch -arm64 python${{ matrix.python-version }} -m pylint $PYLINT_TEST_FILE
 
   test_release_opencv_python:
     if: github.event_name == 'release' && github.event.release.prerelease
-    needs: [build]
-    runs-on: ubuntu-latest
+    needs: [build, test]
+    runs-on: ubuntu-20.04
     environment: test-opencv-python-release
     defaults:
       run:
@@ -87,8 +125,8 @@ jobs:
 
   release_opencv_python:
     if: github.event_name == 'release' && !github.event.release.prerelease
-    needs: [build]
-    runs-on: ubuntu-latest
+    needs: [build, test]
+    runs-on: ubuntu-20.04
     environment: opencv-python-release
     defaults:
       run:
@@ -98,7 +136,6 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload wheels for opencv_python
         run: |
           python -m pip install twine
diff --git a/.github/workflows/build_wheels_windows.yml b/.github/workflows/build_wheels_windows.yml
index 554f684c..087efc04 100644
--- a/.github/workflows/build_wheels_windows.yml
+++ b/.github/workflows/build_wheels_windows.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - 3.4
     paths-ignore:
       - '.github/workflows/build_wheels_linux*'
       - '.github/workflows/build_wheels_macos*'
@@ -13,81 +14,123 @@ on:
 
 jobs:
   build-windows-x86_64:
-    runs-on: ${{ matrix.os }}
-    defaults:
-      run:
-        shell: powershell
-
+    runs-on: windows-2019
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-latest]
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: ['3.6']
         platform: [x86, x64]
         with_contrib: [0, 1]
         without_gui: [0, 1]
         build_sdist: [0]
-
     env:
       ACTIONS_ALLOW_UNSECURE_COMMANDS: true
       SDIST: ${{ matrix.build_sdist || 0 }}
       ENABLE_HEADLESS: ${{ matrix.without_gui }}
       ENABLE_CONTRIB: ${{ matrix.with_contrib }}
       OPENCV_TEST_DATA_PATH: ${{ github.workspace }}\opencv_extra\testdata
-
     steps:
+    - name: Cleanup
+      shell: bash
+      run: |
+        rm -rf ./* || true
+        rm -rf ./.??* || true
+      working-directory: ${{ github.workspace }}
     - name: Checkout
       uses: actions/checkout@v2
       with:
         submodules: false
         fetch-depth: 0
-
     - name: Update submodules
       if: github.event_name == 'pull_request'
       run: git submodule update --remote
-
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
         architecture: ${{ matrix.platform }}
-
     - name: Setup MSBuild.exe
-      uses: warrenbuckley/Setup-MSBuild@v1
-
-    - name: build script
+      uses: microsoft/setup-msbuild@v1.1
+    - name: Build a package
       run: |
         python --version
         python -m pip install --upgrade pip
         python -m pip install --upgrade setuptools
-        set "CI_BUILD=1" && python -m pip wheel --wheel-dir=%cd%\wheelhouse . --verbose
+        python -m pip install toml && python -c "import toml; c = toml.load('pyproject.toml'); print('\n'.join(c['build-system']['requires']))" >> requirements.txt | python -m pip install -r requirements.txt
+        set "CI_BUILD=1" && python setup.py bdist_wheel --py-limited-api=cp36 --dist-dir=%cd%\wheelhouse -v
       shell: cmd
+    - name: Saving all wheels
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheels
+        path: wheelhouse/opencv*.whl
+    - name: Saving a wheel accordingly to matrix
+      uses: actions/upload-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}-${{ matrix.platform }}
+        path: wheelhouse/opencv*
 
-    - name: before test
+  test:
+    needs: [build-windows-x86_64]
+    runs-on: windows-2019
+    defaults:
+      run:
+        shell: cmd
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        platform: [x86, x64]
+        with_contrib: [0, 1]
+        without_gui: [0, 1]
+        build_sdist: [0]
+    env:
+      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
+      OPENCV_TEST_DATA_PATH: ${{ github.workspace }}\opencv_extra\testdata
+      PYLINT_TEST_FILE: ${{ github.workspace }}\opencv\samples\python\squares.py
+    steps:
+    - name: Cleanup
+      shell: bash
+      run: |
+        rm -rf ./* || true
+        rm -rf ./.??* || true
+      working-directory: ${{ github.workspace }}
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+        fetch-depth: 0
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: ${{ matrix.platform }}
+    - name: Download a wheel accordingly to matrix
+      uses: actions/download-artifact@v2
+      with:
+        name: wheel-${{ matrix.with_contrib }}-${{ matrix.without_gui }}-${{ matrix.build_sdist }}-${{ matrix.platform }}
+        path: wheelhouse/
+    - name: Package installation
       run: |
-        git submodule update --init --recursive
         cd ${{ github.workspace }}/tests
         &python -m pip install --user --no-warn-script-location (ls "../wheelhouse/opencv*.whl")
         if ($LastExitCode -ne 0) {throw $LastExitCode}
         python get_build_info.py
       shell: powershell
-
-    - name: run test
+    - name: Run tests
       run: |
         cd ${{ github.workspace }}/opencv
         python modules\python\test\test.py -v --repo .
-      shell: cmd
-
-    - name: saving artifacts
-      uses: actions/upload-artifact@v2
-      with:
-        name: wheels
-        path: wheelhouse/opencv*.whl
+    - name: Pylint test
+      run: |
+        python -m pip install pylint==2.12.2
+        cd ${{ github.workspace }}\tests
+        python -m pylint $PYLINT_TEST_FILE
 
   test_release_opencv_python:
     if: github.event_name == 'release' && github.event.release.prerelease
-    needs: [build-windows-x86_64]
-    runs-on: ubuntu-latest
+    needs: [build-windows-x86_64, test]
+    runs-on: ubuntu-20.04
     environment: test-opencv-python-release
     defaults:
       run:
@@ -97,7 +140,6 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload all wheels
         run: |
           python -m pip install twine
@@ -105,8 +147,8 @@ jobs:
 
   release_opencv_python:
     if: github.event_name == 'release' && !github.event.release.prerelease
-    needs: [build-windows-x86_64]
-    runs-on: ubuntu-latest
+    needs: [build-windows-x86_64, test]
+    runs-on: ubuntu-20.04
     environment: opencv-python-release
     defaults:
       run:
@@ -116,22 +158,18 @@ jobs:
         with:
           name: wheels
           path: wheelhouse/
-
       - name: Upload wheels for opencv_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_python-*
-
       - name: Upload wheels for opencv_contrib_python
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_CONTRIB_PYTHON_USERNAME }} -p ${{ secrets.OPENCV_CONTRIB_PYTHON_PASSWORD }} --skip-existing wheelhouse/opencv_contrib_python-*
-
       - name: Upload wheels for opencv_python_headless
         run: |
           python -m pip install twine
           python -m twine upload -u ${{ secrets.OPENCV_PYTHON_HEADLESS_USERNAME }} -p ${{ secrets.OPENCV_PYTHON_HEADLESS_PASSWORD }} --skip-existing wheelhouse/opencv_python_headless-*
-
       - name: Upload wheels for opencv_contrib_python_headless
         run: |
           python -m pip install twine
diff --git a/.gitmodules b/.gitmodules
index 655467e8..7193d3b9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -6,7 +6,7 @@
 	url = https://github.com/opencv/opencv_contrib.git
 [submodule "multibuild"]
 	path = multibuild
-	url = https://github.com/matthew-brett/multibuild.git
+	url = https://github.com/multi-build/multibuild.git
 [submodule "opencv_extra"]
 	path = opencv_extra
 	url = https://github.com/opencv/opencv_extra.git
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 6ba06d4c..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,410 +0,0 @@
-env:
-    global:
-        - "PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'"
-        # pip dependencies to _test_ your project
-        - TEST_DEPENDS="numpy==1.11.1"
-        # params to bdist_wheel. used to set osx build target.
-        - CONFIG_PATH="travis_config.sh"
-        - USE_CCACHE=1
-        - UNICODE_WIDTH=32
-        - SDIST=0
-
-# Save some time, we and setup check them out on demand instead
-# https://docs.travis-ci.com/user/customizing-the-build/#Git-Clone-Depth
-git:
-    submodules: false
-
-# https://docs.travis-ci.com/user/caching
-cache:
-  directories:
-    # `cache: ccache: true` has no effect if `language:` is not `c` or `cpp`
-    - $HOME/.ccache
-
-# Add more cache stages (s2 etc) and corresponding OSX jobs like s1
-# if brew builds start to take longer than one Travis time limit
-stages:
-  - final
-
-jobs:
-  fast_finish: true
-  # Travis exclude is buggy, this seems to be the only way to disable default build
-  exclude:
-    - language: ruby
-  include:
-    # default builds for Linux
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.6
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.8
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.9
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-
-    # headless builds for Linux
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.6
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.8
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.9
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=0
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-
-    # contrib builds for Linux
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.6
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.8
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.9
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=0
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-
-
-    # headless contrib builds for Linux
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.6
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.7
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.8
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-    - os: linux
-      arch: arm64
-      language: generic
-      dist: xenial
-      services: docker
-      env:
-        - MB_PYTHON_VERSION=3.9
-        - PLAT=aarch64
-        - DOCKER_TEST_IMAGE=multibuild/xenial_arm64v8
-        - ENABLE_CONTRIB=1
-        - ENABLE_HEADLESS=1
-        - TEST_DEPENDS=numpy==1.19.0
-        - USE_CCACHE=0
-      cache:
-        directories: $HOME/.ccache
-
-# The first line is printed in the folding header in Travis output
-before_install: |
-    set -e
-
-    if [[ $SDIST == 0 ]]; then
-      # Check out and prepare the source
-      # Multibuild doesn't have releases, so --depth would break eventually (see
-      # https://superuser.com/questions/1240216/server-does-not-allow-request-for-unadvertised)
-      git submodule update --init multibuild
-
-      source multibuild/common_utils.sh
-
-      # https://github.com/matthew-brett/multibuild/issues/116
-      if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export ARCH_FLAGS=" "; fi
-
-      source multibuild/travis_steps.sh
-      # This sets -x
-
-      source travis_multibuild_customize.sh
-      echo $ENABLE_CONTRIB > contrib.enabled
-      echo $ENABLE_HEADLESS > headless.enabled
-
-      echo "end"
-      # Not interested in travis internal scripts' output
-    fi
-
-    set +x
-
-install: |
-    # Build and package
-    set -x
-
-    if [[ $SDIST == 1 ]]; then
-      python -m pip install --upgrade pip
-      python -m pip install scikit-build
-      python setup.py sdist
-    else
-      build_wheel $REPO_DIR $PLAT
-    fi
-
-    set +x
-
-script: |
-    # Install and run tests
-    set -x
-    if [[ $SDIST == 1 ]]; then
-      echo "skipping tests because of sdist"
-    else
-      install_run $PLAT && rc=$? || rc=$?
-    fi
-
-    set +x
-
-    #otherwise, Travis logic terminates prematurely
-    #https://travis-ci.community/t/shell-session-update-command-not-found-in-build-log-causes-build-to-fail-if-trap-err-is-set/817
-    trap ERR
-    test "$rc" -eq 0
-
-after_success: |
-    # Upload wheels to pypi if tag is set
-
-    set -x
-
-    if [ -n "$TRAVIS_TAG" ]; then
-
-      if [[ $ENABLE_CONTRIB == 0 ]]; then
-        if [[ $ENABLE_HEADLESS == 0 ]]; then
-          echo "This is default build. Deployment will be done to to PyPI entry opencv-python."
-        else
-          echo "This is headless contrib build. Deployment will be done to to PyPI entry opencv-python-headless."
-        fi
-      else
-        if [[ $ENABLE_HEADLESS == 0 ]]; then
-          echo "This is contrib build. Deployment will be done to to PyPI entry opencv-contrib-python."
-        else
-          echo "This is headless contrib build. Deployment will be done to to PyPI entry opencv-contrib-python-headless."
-        fi
-      fi
-
-      if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-        if [[ $SDIST == 1 ]]; then
-          pip install twine
-          twine upload -u ${PYPI_USER} -p ${PASS} --skip-existing ${TRAVIS_BUILD_DIR}/dist/opencv*
-        else
-          pip install --user twine
-          pip install --user --upgrade six
-          twine upload -u ${PYPI_USER} -p ${PASS} --skip-existing ${TRAVIS_BUILD_DIR}/wheelhouse/opencv*
-        fi
-
-      fi
-
-      if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-        # macpython 3.5 doesn't support recent TLS protocols which causes twine
-        # upload to fail, so we use the system Python to run twine
-        /usr/bin/python -m ensurepip --user
-        /usr/bin/python -m pip install --user -U pip
-        /usr/bin/python -m pip install --user -U -I twine
-
-        if [[ $SDIST == 1 ]]; then
-          /usr/bin/python -m twine upload -u ${PYPI_USER} -p ${PASS} --skip-existing ${TRAVIS_BUILD_DIR}/dist/opencv*
-        else
-          /usr/bin/python -m twine upload -u ${PYPI_USER} -p ${PASS} --skip-existing ${TRAVIS_BUILD_DIR}/wheelhouse/opencv*
-        fi
-
-      fi
-
-    fi
-
-    # # Save to Azure storage always
-
-    # if [[ $TRAVIS_CPU_ARCH != "arm64" ]]; then
-    #   if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-    #     curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
-    #   else
-    #     brew install azure-cli
-    #   fi
-
-    #   az storage container create -n ${TRAVIS_COMMIT} --public-access blob
-
-    #   if [[ $SDIST == 1 ]]; then
-    #     az storage blob upload-batch -d ${TRAVIS_COMMIT} -s ${TRAVIS_BUILD_DIR}/dist --pattern *.gz
-    #   else
-    #     az storage blob upload-batch -d ${TRAVIS_COMMIT} -s ${TRAVIS_BUILD_DIR}/wheelhouse --pattern opencv*.whl
-    #   fi
-    # fi
-
-    set +x
-
diff --git a/LICENSE-3RD-PARTY.txt b/LICENSE-3RD-PARTY.txt
index 20f4fb37..caeffe51 100644
--- a/LICENSE-3RD-PARTY.txt
+++ b/LICENSE-3RD-PARTY.txt
@@ -1000,7 +1000,7 @@ This license applies to above binaries in the directory cv2/.
  * The implementation was written so as to conform with Netscapes SSL.
  *
  * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
+ * the following conditions are adhered to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
@@ -1025,7 +1025,7 @@ This license applies to above binaries in the directory cv2/.
  *    must display the following acknowledgement:
  *    "This product includes cryptographic software written by
  *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
+ *    The word 'cryptographic' can be left out if the routines from the library
  *    being used are not cryptographic related :-).
  * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
@@ -1043,7 +1043,7 @@ This license applies to above binaries in the directory cv2/.
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * The licence and distribution terms for any publically available version or
+ * The licence and distribution terms for any publicly available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
  * [including the GNU Public Licence.]
diff --git a/MANIFEST.in b/MANIFEST.in
index 45cb6c40..b429eae0 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -9,3 +9,4 @@ recursive-include docker *
 recursive-include opencv *
 recursive-include opencv_contrib *
 recursive-include patches *
+recursive-include scripts *.py
diff --git a/README.md b/README.md
index 9629aae0..d60fcdf2 100644
--- a/README.md
+++ b/README.md
@@ -65,9 +65,9 @@ If you still encounter the error after you have checked all the previous solutio
 
 A: Make sure you have removed old manual installations of OpenCV Python bindings (cv2.so or cv2.pyd in site-packages).
 
-**Q: Function foo() or method bar() returns wrong result, throws exception or crashes interpriter. What should I do?**
+**Q: Function foo() or method bar() returns wrong result, throws exception or crashes interpreter. What should I do?**
 
-A: The repository contains only OpenCV-Python package build scripts, but not OpenCV itself. Python bindings for OpenCV are developed in official OpenCV repository and it's the best place to report issues. Also please check {OpenCV wiki](https://github.com/opencv/opencv/wiki) and [the fficial OpenCV forum](https://forum.opencv.org/) before file new bugs.
+A: The repository contains only OpenCV-Python package build scripts, but not OpenCV itself. Python bindings for OpenCV are developed in official OpenCV repository and it's the best place to report issues. Also please check {OpenCV wiki](https://github.com/opencv/opencv/wiki) and [the official OpenCV forum](https://forum.opencv.org/) before file new bugs.
 
 **Q: Why the packages do not include non-free algorithms?**
 
@@ -79,15 +79,16 @@ A: It's easier for users to understand ``opencv-python`` than ``cv2`` and it mak
 
 ## Documentation for opencv-python
 
-[![AppVeyor CI test status (Windows)](https://img.shields.io/appveyor/ci/skvark/opencv-python.svg?maxAge=3600&label=Windows)](https://ci.appveyor.com/project/skvark/opencv-python)
-[![Travis CI test status (Linux and macOS)](https://img.shields.io/travis/com/skvark/opencv-python/master?label=Linux%20%26%20macOS)](https://travis-ci.com/github/skvark/opencv-python/)
+[![Windows Build Status](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_windows.yml/badge.svg)](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_windows.yml)
+[![(Linux Build status)](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_linux.yml/badge.svg)](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_linux.yml)
+[![(Mac OS Build status)](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_macos.yml/badge.svg)](https://github.com/opencv/opencv-python/actions/workflows/build_wheels_macos.yml)
 
 The aim of this repository is to provide means to package each new [OpenCV release](https://github.com/opencv/opencv/releases) for the most used Python versions and platforms.
 
 ### CI build process
 
 The project is structured like a normal Python package with a standard ``setup.py`` file.
-The build process for a single entry in the build matrices is as follows (see for example ``appveyor.yml`` file):
+The build process for a single entry in the build matrices is as follows (see for example `.github/workflows/build_wheels_linux.yml` file):
 
 0. In Linux and MacOS build: get OpenCV's optional C dependencies that we compile against
 
@@ -181,7 +182,7 @@ Third party package licenses are at [LICENSE-3RD-PARTY.txt](https://github.com/o
 
 All wheels ship with [FFmpeg](http://ffmpeg.org) licensed under the [LGPLv2.1](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html).
 
-Non-headless Linux and MacOS wheels ship with [Qt 5](http://doc.qt.io/qt-5/lgpl.html) licensed under the [LGPLv3](http://www.gnu.org/licenses/lgpl-3.0.html).
+Non-headless Linux wheels ship with [Qt 5](http://doc.qt.io/qt-5/lgpl.html) licensed under the [LGPLv3](http://www.gnu.org/licenses/lgpl-3.0.html).
 
 The packages include also other binaries. Full list of licenses can be found from [LICENSE-3RD-PARTY.txt](https://github.com/opencv/opencv-python/blob/master/LICENSE-3RD-PARTY.txt).
 
@@ -219,6 +220,7 @@ Python 3.x compatible pre-built wheels are provided for the officially supported
 - 3.7
 - 3.8
 - 3.9
+- 3.10
 
 ### Backward compatibility
 
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index c79e7de4..00000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,201 +0,0 @@
-environment:
-  USER:
-    secure: fXgF9uyy6sT0JoVOR7BoqA==
-
-  PASS:
-    secure: 0bXSOVjf9x8L7nErTivu92TF1FwNosTjFJQPmxp8Dys=
-
-  matrix:
-    - PYTHON: "C:\\Python36"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python36-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python37"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python37-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python38"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python38-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python39"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python39-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python36"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python36-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python37"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python37-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python38"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python38-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python39"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python39-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 0
-
-    - PYTHON: "C:\\Python36"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python36-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python37"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python37-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python38"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python38-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python39"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python39-x64"
-      ENABLE_CONTRIB: 0
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python36"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python36-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python37"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python37-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python38"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python38-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python39"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-    - PYTHON: "C:\\Python39-x64"
-      ENABLE_CONTRIB: 1
-      ENABLE_HEADLESS: 1
-
-matrix:
-    fast_finish: true
-
-install:
-  - ps: |
-      if (-not (Test-Path $env:PYTHON)) {
-        curl -o install_python.ps1 https://raw.githubusercontent.com/matthew-brett/multibuild/devel/install_python.ps1
-        .\install_python.ps1
-      }
-  - ps: if (-not (Test-Path $env:PYTHON)) { throw "No $env:PYTHON" }
-  - "set PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
-  - python --version
-
-build_script:
-- cmd: |
-    "%PYTHON%\\python.exe" -m pip install --upgrade pip
-    "%PYTHON%\\python.exe" -m pip install --upgrade setuptools
-    set "CI_BUILD=1" && "%PYTHON%\\python.exe" -m pip wheel --wheel-dir=%cd%\dist . --verbose
-
-before_test:
-- ps: |
-
-    cd ${Env:APPVEYOR_BUILD_FOLDER}\tests
-    $env:PYTHONWARNINGS = "ignore:::pip._internal.cli.base_command"
-    &"${Env:PYTHON}\\python.exe" -m pip install --user --no-warn-script-location (ls "../dist/opencv_*.whl")
-    if ($LastExitCode -ne 0) {throw $LastExitCode}
-
-test_script:
-- cmd: |
-
-    cd %APPVEYOR_BUILD_FOLDER%\tests
-    "%PYTHON%\\python.exe" -m unittest test
-
-artifacts:
-- path: dist\opencv*.whl
-  name: wheels
-
-deploy_script:
-- ps: |
-
-    if (${Env:APPVEYOR_REPO_TAG} -eq "true") {
-      cd ${Env:APPVEYOR_BUILD_FOLDER}
-      if (${Env:ENABLE_CONTRIB} -eq 0) {
-        if (${Env:ENABLE_HEADLESS} -eq 0) {
-          echo "This is a default build. Deployment will be done to PyPI entry opencv-python."
-        }
-        else {
-          echo "This is a headless build. Deployment will be done to PyPI entry opencv-python-headless."
-        }
-      }
-      else {
-        if (${Env:ENABLE_HEADLESS} -eq 0) {
-          echo "This is a contrib build. Deployment will be done to PyPI entry opencv-contrib-python."
-        }
-        else {
-          echo "This is a headless contrib build. Deployment will be done to PyPI entry opencv-contrib-python-headless."
-        }
-      }
-
-      &"${Env:PYTHON}\\python.exe" -m pip install twine
-      &"${Env:PYTHON}\\python.exe" -m twine upload -u ${Env:USER} -p ${Env:PASS} --skip-existing dist/opencv*
-    }
-    else {
-      echo "Tag not set, deployment skipped."
-    }
diff --git a/cv2/__init__.py b/cv2/__init__.py
index 0c080d52..e69de29b 100644
--- a/cv2/__init__.py
+++ b/cv2/__init__.py
@@ -1,31 +0,0 @@
-import importlib
-import os
-import sys
-
-from .cv2 import *
-from .data import *
-
-# wildcard import above does not import "private" variables like __version__
-# this makes them available
-globals().update(importlib.import_module("cv2.cv2").__dict__)
-
-ci_and_not_headless = False
-
-try:
-    from .version import ci_build, headless
-
-    ci_and_not_headless = ci_build and not headless
-except:
-    pass
-
-# the Qt plugin is included currently only in the pre-built wheels
-if sys.platform.startswith("linux") and ci_and_not_headless:
-    os.environ["QT_QPA_PLATFORM_PLUGIN_PATH"] = os.path.join(
-        os.path.dirname(os.path.abspath(__file__)), "qt", "plugins"
-    )
-
-# Qt will throw warning on Linux if fonts are not found
-if sys.platform.startswith("linux") and ci_and_not_headless:
-    os.environ["QT_QPA_FONTDIR"] = os.path.join(
-        os.path.dirname(os.path.abspath(__file__)), "qt", "fonts"
-    )
diff --git a/docker/manylinux2014/Dockerfile_aarch64 b/docker/manylinux2014/Dockerfile_aarch64
index e8920770..2679cbbf 100644
--- a/docker/manylinux2014/Dockerfile_aarch64
+++ b/docker/manylinux2014/Dockerfile_aarch64
@@ -1,73 +1,142 @@
+# Version: 20220628
+# Image name: quay.io/opencv-ci/opencv-python-manylinux2014-aarch64
+
 FROM quay.io/pypa/manylinux2014_aarch64:latest
 
-RUN yum install bzip2-devel curl-devel zlib-devel xcb-util-renderutil-devel xcb-util-devel xcb-util-image-devel xcb-util-keysyms-devel xcb-util-wm-devel mesa-libGL-devel libxkbcommon-devel libxkbcommon-x11-devel libXi-devel freetype-devel -y
+ARG CCACHE_VERSION=3.7.9
+ARG FFMPEG_VERSION=4.4.1
+ARG FREETYPE_VERSION=2.12.1
+ARG LIBPNG_VERSION=1.6.37
+ARG NASM_VERSION=2.15.04
+ARG OPENSSL_VERSION=1_1_1o
+ARG QT_VERSION=5.15.0
+ARG YASM_VERSION=1.3.0
+
+ENV LD_LIBRARY_PATH /usr/local/lib:$LD_LIBRARY_PATH
+
+# epel-release need for aarch64 to get openblas packages
+RUN yum install bzip2-devel curl-devel zlib-devel xcb-util-renderutil-devel xcb-util-devel xcb-util-image-devel xcb-util-keysyms-devel xcb-util-wm-devel mesa-libGL-devel libxkbcommon-devel libxkbcommon-x11-devel libXi-devel lapack-devel epel-release -y && \
+    yum install openblas-devel -y && \
+    cp /usr/include/lapacke/lapacke*.h /usr/include/ && \
+    curl https://raw.githubusercontent.com/xianyi/OpenBLAS/v0.3.3/cblas.h -o /usr/include/cblas.h && \
+    # libpng will be built from source
+    yum remove libpng -y
+
+RUN mkdir ~/libpng_sources && \
+    cd ~/libpng_sources && \
+    curl -O -L https://download.sourceforge.net/libpng/libpng-${LIBPNG_VERSION}.tar.gz && \
+    tar -xf libpng-${LIBPNG_VERSION}.tar.gz && \
+    cd libpng-${LIBPNG_VERSION} && \
+    ./configure --prefix=/usr/local && \
+    make && \
+    make install && \
+    cd .. && \
+    rm -rf ~/libpng_sources
+
+RUN mkdir ~/freetype_sources && \
+    cd ~/freetype_sources && \
+    curl -O -L https://download.savannah.gnu.org/releases/freetype/freetype-${FREETYPE_VERSION}.tar.gz && \
+    tar -xf freetype-${FREETYPE_VERSION}.tar.gz && \
+    cd freetype-${FREETYPE_VERSION} && \
+    ./configure --prefix="/ffmpeg_build" --enable-freetype-config && \
+    make && \
+    make install && \
+    cd .. && \
+    rm -rf ~/freetype_sources
 
-RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/5.15.0/single/qt-everywhere-src-5.15.0.tar.xz && \
-    tar -xf qt-everywhere-src-5.15.0.tar.xz && \
-    cd qt-everywhere* && \
+RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/${QT_VERSION}/single/qt-everywhere-src-${QT_VERSION}.tar.xz && \
+    tar -xf qt-everywhere-src-${QT_VERSION}.tar.xz && \
+    cd qt-everywhere-src-${QT_VERSION} && \
     export MAKEFLAGS=-j$(nproc) && \
-    ./configure -prefix /opt/Qt5.15.0 -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
+    ./configure -prefix /opt/Qt${QT_VERSION} -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
     make && \
     make install && \
     cd .. && \
-    rm -rf qt-everywhere-src-5.15.0 && \
-    rm qt-everywhere-src-5.15.0.tar.xz
+    rm -rf qt-everywhere*
 
-ENV QTDIR /opt/Qt5.15.0
+ENV QTDIR /opt/Qt${QT_VERSION}
 ENV PATH "$QTDIR/bin:$PATH"
 
-RUN mkdir ~/ffmpeg_sources && \
-    cd ~/ffmpeg_sources && \
-    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_1_1_1g.tar.gz && \
-    tar -xf OpenSSL_1_1_1g.tar.gz && \
-    cd openssl-OpenSSL_1_1_1g && \
-    ./config --prefix="$HOME/ffmpeg_build" --openssldir="$HOME/ffmpeg_build" no-pinshared shared zlib && \
+RUN mkdir ~/openssl_sources && \
+    cd ~/openssl_sources && \
+    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    tar -xf OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    cd openssl-OpenSSL_${OPENSSL_VERSION} && \
+    ./config --prefix="/ffmpeg_build" --openssldir="/ffmpeg_build" no-pinshared shared zlib && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     # skip installing documentation
     make install_sw && \
-    rm -rf ~/openssl_build
+    cd .. && \
+    rm -rf ~/openssl_build ~/openssl_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/2.14.01/nasm-2.14.01.tar.bz2 && \
-    tar -xf nasm-2.14.01.tar.bz2 && cd nasm-2.14.01 && ./autogen.sh && \
-    ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" && \
+RUN mkdir ~/nasm_sources && \
+    cd ~/nasm_sources && \
+    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/${NASM_VERSION}/nasm-${NASM_VERSION}.tar.bz2 && \
+    tar -xf nasm-${NASM_VERSION}.tar.bz2 && cd nasm-${NASM_VERSION} && ./autogen.sh && \
+    ./configure --prefix="/ffmpeg_build" --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/nasm_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz && \
-    tar -xf yasm-1.3.0.tar.gz && \
-    cd yasm-1.3.0 && \
-    ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" && \
+RUN mkdir ~/yasm_sources && \
+    cd ~/yasm_sources && \
+    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-${YASM_VERSION}.tar.gz && \
+    tar -xf yasm-${YASM_VERSION}.tar.gz && \
+    cd yasm-${YASM_VERSION} && \
+    ./configure --prefix="/ffmpeg_build" --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/yasm_sources
 
-RUN cd ~/ffmpeg_sources && \
-    git clone --depth 1 https://chromium.googlesource.com/webm/libvpx.git && \
+RUN mkdir ~/libvpx_sources && \
+    cd ~/libvpx_sources && \
+    git clone --depth 1 https://github.com/webmproject/libvpx.git && \
     cd libvpx && \
-    ./configure --prefix="$HOME/ffmpeg_build" --disable-examples --disable-unit-tests --enable-vp9-highbitdepth --as=yasm --enable-pic --enable-shared && \
+    ./configure --prefix="/ffmpeg_build" --disable-examples --disable-unit-tests --enable-vp9-highbitdepth --as=yasm --enable-pic --enable-shared && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/libvpx_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
-    tar -xf ffmpeg-snapshot.tar.bz2 && \
-    cd ffmpeg && \
+RUN mkdir ~/ffmpeg_sources && \
+    cd ~/ffmpeg_sources && \
+    curl -O -L https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    tar -xf ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    cd ffmpeg-${FFMPEG_VERSION} && \
     PATH=~/bin:$PATH && \
-    PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --prefix="$HOME/ffmpeg_build" --extra-cflags="-I$HOME/ffmpeg_build/include" --extra-ldflags="-L$HOME/ffmpeg_build/lib" --enable-openssl --enable-libvpx --enable-shared --enable-pic --bindir="$HOME/bin" && \
+    PKG_CONFIG_PATH="/ffmpeg_build/lib/pkgconfig" ./configure --prefix="/ffmpeg_build" --extra-cflags="-I/ffmpeg_build/include" --extra-ldflags="-L/ffmpeg_build/lib" --enable-openssl --enable-libvpx --enable-shared --enable-pic --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     make install && \
-    echo "/root/ffmpeg_build/lib/" >> /etc/ld.so.conf && \
+    echo "/ffmpeg_build/lib/" >> /etc/ld.so.conf && \
     ldconfig && \
-    rm -rf ~/ffmpeg_sources
+    rm -rf ~/ffmpeg_sources && \
+    yum remove bzip2-devel -y
 
-RUN curl -O -L https://github.com/ccache/ccache/releases/download/v3.7.9/ccache-3.7.9.tar.gz && \
-    tar -xf ccache-3.7.9.tar.gz && \
-    cd ccache-3.7.9 && \
+RUN curl -O -L https://github.com/ccache/ccache/releases/download/v${CCACHE_VERSION}/ccache-${CCACHE_VERSION}.tar.gz && \
+    tar -xf ccache-${CCACHE_VERSION}.tar.gz && \
+    cd ccache-${CCACHE_VERSION} && \
     linux32 ./configure && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ccache-${CCACHE_VERSION}.tar.gz
+
+# Self-hosted runner UID is 1004
+RUN useradd ci -m -s /bin/bash -G users --uid=1004 && \
+    mkdir /io && \
+    chown -R ci:ci /io && \
+    # This needs to find ffmpeg packages from ci user
+    chown -R ci:ci /ffmpeg_build && \
+    # This calls in mutlibuild scripts and cannot be run without permissions
+    chown -R ci:ci /opt/_internal/pipx/venvs/auditwheel
+
+USER ci
+
+# Git security vulnerability: https://github.blog/2022-04-12-git-security-vulnerability-announced
+RUN git config --global --add safe.directory /io
 
-ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig:/root/ffmpeg_build/lib/pkgconfig
-ENV LDFLAGS -L/root/ffmpeg_build/lib
+ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig:/ffmpeg_build/lib/pkgconfig
+ENV LDFLAGS -L/ffmpeg_build/lib
 ENV PATH "$HOME/bin:$PATH"
diff --git a/docker/manylinux2014/Dockerfile_i686 b/docker/manylinux2014/Dockerfile_i686
index 39fc1560..3b866874 100644
--- a/docker/manylinux2014/Dockerfile_i686
+++ b/docker/manylinux2014/Dockerfile_i686
@@ -1,26 +1,34 @@
 FROM quay.io/pypa/manylinux2014_i686:latest
 
+ARG CCACHE_VERSION=3.7.9
+ARG CMAKE_VERSION=3.17.0
+ARG FFMPEG_VERSION=4.4.1
+ARG NASM_VERSION=2.15.04
+ARG OPENSSL_VERSION=1_1_1m
+ARG QT_VERSION=5.15.0
+ARG YASM_VERSION=1.3.0
+
 RUN yum install bzip2-devel curl-devel zlib-devel xcb-util-renderutil-devel xcb-util-devel xcb-util-image-devel xcb-util-keysyms-devel xcb-util-wm-devel mesa-libGL-devel libxkbcommon-devel libxkbcommon-x11-devel libXi-devel freetype-devel -y
 
-RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/5.15.0/single/qt-everywhere-src-5.15.0.tar.xz && \
-    tar -xf qt-everywhere-src-5.15.0.tar.xz && \
+RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/${QT_VERSION}/single/qt-everywhere-src-${QT_VERSION}.tar.xz && \
+    tar -xf qt-everywhere-src-${QT_VERSION}.tar.xz && \
     cd qt-everywhere* && \
     export MAKEFLAGS=-j$(nproc) && \
-    ./configure -prefix /opt/Qt5.15.0 -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
+    ./configure -prefix /opt/Qt${QT_VERSION} -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
     make && \
     make install && \
     cd .. && \
-    rm -rf qt-everywhere-src-5.15.0 && \
-    rm qt-everywhere-src-5.15.0.tar.xz
+    rm -rf qt-everywhere-src-${QT_VERSION} && \
+    rm qt-everywhere-src-${QT_VERSION}.tar.xz
 
-ENV QTDIR /opt/Qt5.15.0
+ENV QTDIR /opt/Qt${QT_VERSION}
 ENV PATH "$QTDIR/bin:$PATH"
 
 RUN mkdir ~/ffmpeg_sources && \
     cd ~/ffmpeg_sources && \
-    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_1_1_1g.tar.gz && \
-    tar -xf OpenSSL_1_1_1g.tar.gz && \
-    cd openssl-OpenSSL_1_1_1g && \
+    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    tar -xf OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    cd openssl-OpenSSL_${OPENSSL_VERSION} && \
     # in i686, ./config detects x64 in i686 container without linux32
     # when run from "docker build"
     linux32 ./config --prefix="$HOME/ffmpeg_build" no-pinshared shared zlib && \
@@ -30,16 +38,16 @@ RUN mkdir ~/ffmpeg_sources && \
     rm -rf ~/openssl_build
 
 RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/2.14.01/nasm-2.14.01.tar.bz2 && \
-    tar -xf nasm-2.14.01.tar.bz2 && cd nasm-2.14.01 && ./autogen.sh && \
+    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/${NASM_VERSION}/nasm-${NASM_VERSION}.tar.bz2 && \
+    tar -xf nasm-${NASM_VERSION}.tar.bz2 && cd nasm-${NASM_VERSION} && ./autogen.sh && \
     linux32 ./configure && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     make install
 
 RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz && \
-    tar -xf yasm-1.3.0.tar.gz && \
-    cd yasm-1.3.0 && \
+    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-${YASM_VERSION}.tar.gz && \
+    tar -xf yasm-${YASM_VERSION}.tar.gz && \
+    cd yasm-${YASM_VERSION} && \
     linux32 ./configure && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     make install
@@ -52,9 +60,9 @@ RUN cd ~/ffmpeg_sources && \
     make install
 
 RUN cd ~/ffmpeg_sources && \
-    curl -O -L https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
-    tar -xf ffmpeg-snapshot.tar.bz2 && \
-    cd ffmpeg && \
+    curl -O -L https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    tar -xf ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    cd ffmpeg-${FFMPEG_VERSION} && \
     PATH=~/bin:$PATH && \
     PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" linux32 ./configure --prefix="$HOME/ffmpeg_build" --extra-cflags="-I$HOME/ffmpeg_build/include" --extra-ldflags="-L$HOME/ffmpeg_build/lib" --enable-openssl --enable-libvpx --enable-shared --enable-pic --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
@@ -63,22 +71,22 @@ RUN cd ~/ffmpeg_sources && \
     ldconfig && \
     rm -rf ~/ffmpeg_sources
 
-RUN curl -O -L https://github.com/ccache/ccache/releases/download/v3.7.9/ccache-3.7.9.tar.gz && \
-    tar -xf ccache-3.7.9.tar.gz && \
-    cd ccache-3.7.9 && \
+RUN curl -O -L https://github.com/ccache/ccache/releases/download/v${CCACHE_VERSION}/ccache-${CCACHE_VERSION}.tar.gz && \
+    tar -xf ccache-${CCACHE_VERSION}.tar.gz && \
+    cd ccache-${CCACHE_VERSION} && \
     linux32 ./configure && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     make install
 
-RUN curl -O -L https://github.com/Kitware/CMake/releases/download/v3.17.0/cmake-3.17.0.tar.gz && \
-    tar -xf cmake-3.17.0.tar.gz && \
-    cd cmake-3.17.0 && \
+RUN curl -O -L https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}.tar.gz && \
+    tar -xf cmake-${CMAKE_VERSION}.tar.gz && \
+    cd cmake-${CMAKE_VERSION} && \
     export MAKEFLAGS=-j$(getconf _NPROCESSORS_ONLN) && \
     ./configure --system-curl && \
     make && \
     make install && \
     cd .. && \
-    rm -rf cmake-3.17.0*
+    rm -rf cmake-${CMAKE_VERSION}*
 
 ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig:/root/ffmpeg_build/lib/pkgconfig
 ENV LDFLAGS -L/root/ffmpeg_build/lib
diff --git a/docker/manylinux2014/Dockerfile_x86_64 b/docker/manylinux2014/Dockerfile_x86_64
index 010120ca..8bb77341 100644
--- a/docker/manylinux2014/Dockerfile_x86_64
+++ b/docker/manylinux2014/Dockerfile_x86_64
@@ -1,66 +1,142 @@
+# Version: 20220628
+# Image name: quay.io/opencv-ci/opencv-python-manylinux2014-x86-64
+
 FROM quay.io/pypa/manylinux2014_x86_64:latest
 
-RUN yum install bzip2-devel curl-devel zlib-devel xcb-util-renderutil-devel xcb-util-devel xcb-util-image-devel xcb-util-keysyms-devel xcb-util-wm-devel mesa-libGL-devel libxkbcommon-devel libxkbcommon-x11-devel libXi-devel freetype-devel -y
+ARG CCACHE_VERSION=3.7.9
+ARG FFMPEG_VERSION=4.4.1
+ARG FREETYPE_VERSION=2.12.1
+ARG LIBPNG_VERSION=1.6.37
+ARG NASM_VERSION=2.15.04
+ARG OPENSSL_VERSION=1_1_1o
+ARG QT_VERSION=5.15.0
+ARG YASM_VERSION=1.3.0
+
+ENV LD_LIBRARY_PATH /usr/local/lib:$LD_LIBRARY_PATH
+
+# epel-release need for aarch64 to get openblas packages
+RUN yum install bzip2-devel curl-devel zlib-devel xcb-util-renderutil-devel xcb-util-devel xcb-util-image-devel xcb-util-keysyms-devel xcb-util-wm-devel mesa-libGL-devel libxkbcommon-devel libxkbcommon-x11-devel libXi-devel lapack-devel epel-release -y && \
+    yum install openblas-devel -y && \
+    cp /usr/include/lapacke/lapacke*.h /usr/include/ && \
+    curl https://raw.githubusercontent.com/xianyi/OpenBLAS/v0.3.3/cblas.h -o /usr/include/cblas.h && \
+    # libpng will be built from source
+    yum remove libpng -y
+
+RUN mkdir ~/libpng_sources && \
+    cd ~/libpng_sources && \
+    curl -O -L https://download.sourceforge.net/libpng/libpng-${LIBPNG_VERSION}.tar.gz && \
+    tar -xf libpng-${LIBPNG_VERSION}.tar.gz && \
+    cd libpng-${LIBPNG_VERSION} && \
+    ./configure --prefix=/usr/local && \
+    make && \
+    make install && \
+    cd .. && \
+    rm -rf ~/libpng_sources
 
-RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/5.15.0/single/qt-everywhere-src-5.15.0.tar.xz && \
-    tar -xf qt-everywhere-src-5.15.0.tar.xz && \
-    cd qt-everywhere* && \
+RUN mkdir ~/freetype_sources && \
+    cd ~/freetype_sources && \
+    curl -O -L https://download.savannah.gnu.org/releases/freetype/freetype-${FREETYPE_VERSION}.tar.gz && \
+    tar -xf freetype-${FREETYPE_VERSION}.tar.gz && \
+    cd freetype-${FREETYPE_VERSION} && \
+    ./configure --prefix="/ffmpeg_build" --enable-freetype-config && \
+    make && \
+    make install && \
+    cd .. && \
+    rm -rf ~/freetype_sources
+
+RUN curl -O -L https://download.qt.io/official_releases/qt/5.15/${QT_VERSION}/single/qt-everywhere-src-${QT_VERSION}.tar.xz && \
+    tar -xf qt-everywhere-src-${QT_VERSION}.tar.xz && \
+    cd qt-everywhere-src-${QT_VERSION} && \
     export MAKEFLAGS=-j$(nproc) && \
-    ./configure -prefix /opt/Qt5.15.0 -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
+    ./configure -prefix /opt/Qt${QT_VERSION} -release -opensource -confirm-license -qtnamespace QtOpenCVPython -xcb -xcb-xlib -bundled-xcb-xinput -no-openssl -no-dbus -skip qt3d -skip qtactiveqt -skip qtcanvas3d -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip qtimageformats -skip qtlocation -skip qtmultimedia -skip qtpurchasing -skip qtqa -skip qtremoteobjects -skip qtrepotools -skip qtscript -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwebview -skip xmlpatterns -skip declarative -make libs && \
     make && \
     make install && \
     cd .. && \
-    rm -rf qt-everywhere-src-5.15.0 && \
-    rm qt-everywhere-src-5.15.0.tar.xz
+    rm -rf qt-everywhere*
 
-ENV QTDIR /opt/Qt5.15.0
+ENV QTDIR /opt/Qt${QT_VERSION}
 ENV PATH "$QTDIR/bin:$PATH"
 
-RUN mkdir ~/ffmpeg_sources && \
-    cd ~/ffmpeg_sources && \
-    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_1_1_1g.tar.gz && \
-    tar -xf OpenSSL_1_1_1g.tar.gz && \
-    cd openssl-OpenSSL_1_1_1g && \
-    ./config --prefix="$HOME/ffmpeg_build" --openssldir="$HOME/ffmpeg_build" no-pinshared shared zlib && \
+RUN mkdir ~/openssl_sources && \
+    cd ~/openssl_sources && \
+    curl -O -L https://github.com/openssl/openssl/archive/OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    tar -xf OpenSSL_${OPENSSL_VERSION}.tar.gz && \
+    cd openssl-OpenSSL_${OPENSSL_VERSION} && \
+    ./config --prefix="/ffmpeg_build" --openssldir="/ffmpeg_build" no-pinshared shared zlib && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     # skip installing documentation
     make install_sw && \
-    rm -rf ~/openssl_build
+    cd .. && \
+    rm -rf ~/openssl_build ~/openssl_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/2.14.01/nasm-2.14.01.tar.bz2 && \
-    tar -xf nasm-2.14.01.tar.bz2 && cd nasm-2.14.01 && ./autogen.sh && \
-    ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" && \
+RUN mkdir ~/nasm_sources && \
+    cd ~/nasm_sources && \
+    curl -O -L http://www.nasm.us/pub/nasm/releasebuilds/${NASM_VERSION}/nasm-${NASM_VERSION}.tar.bz2 && \
+    tar -xf nasm-${NASM_VERSION}.tar.bz2 && cd nasm-${NASM_VERSION} && ./autogen.sh && \
+    ./configure --prefix="/ffmpeg_build" --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/nasm_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz && \
-    tar -xf yasm-1.3.0.tar.gz && \
-    cd yasm-1.3.0 && \
-    ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" && \
+RUN mkdir ~/yasm_sources && \
+    cd ~/yasm_sources && \
+    curl -O -L http://www.tortall.net/projects/yasm/releases/yasm-${YASM_VERSION}.tar.gz && \
+    tar -xf yasm-${YASM_VERSION}.tar.gz && \
+    cd yasm-${YASM_VERSION} && \
+    ./configure --prefix="/ffmpeg_build" --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/yasm_sources
 
-RUN cd ~/ffmpeg_sources && \
+RUN mkdir ~/libvpx_sources && \
+    cd ~/libvpx_sources && \
     git clone --depth 1 https://chromium.googlesource.com/webm/libvpx.git && \
     cd libvpx && \
-    ./configure --prefix="$HOME/ffmpeg_build" --disable-examples --disable-unit-tests --enable-vp9-highbitdepth --as=yasm --enable-pic --enable-shared && \
+    ./configure --prefix="/ffmpeg_build" --disable-examples --disable-unit-tests --enable-vp9-highbitdepth --as=yasm --enable-pic --enable-shared && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
-    make install
+    make install && \
+    cd .. && \
+    rm -rf ~/libvpx_sources
 
-RUN cd ~/ffmpeg_sources && \
-    curl -O -L https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 && \
-    tar -xf ffmpeg-snapshot.tar.bz2 && \
-    cd ffmpeg && \
+RUN mkdir ~/ffmpeg_sources && \
+    cd ~/ffmpeg_sources && \
+    curl -O -L https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    tar -xf ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \
+    cd ffmpeg-${FFMPEG_VERSION} && \
     PATH=~/bin:$PATH && \
-    PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure --prefix="$HOME/ffmpeg_build" --extra-cflags="-I$HOME/ffmpeg_build/include" --extra-ldflags="-L$HOME/ffmpeg_build/lib" --enable-openssl --enable-libvpx --enable-shared --enable-pic --bindir="$HOME/bin" && \
+    PKG_CONFIG_PATH="/ffmpeg_build/lib/pkgconfig" ./configure --prefix="/ffmpeg_build" --extra-cflags="-I/ffmpeg_build/include" --extra-ldflags="-L/ffmpeg_build/lib" --enable-openssl --enable-libvpx --enable-shared --enable-pic --bindir="$HOME/bin" && \
     make -j$(getconf _NPROCESSORS_ONLN) && \
     make install && \
-    echo "/root/ffmpeg_build/lib/" >> /etc/ld.so.conf && \
+    echo "/ffmpeg_build/lib/" >> /etc/ld.so.conf && \
     ldconfig && \
-    rm -rf ~/ffmpeg_sources
+    rm -rf ~/ffmpeg_sources && \
+    yum remove bzip2-devel -y
+
+RUN curl -O -L https://github.com/ccache/ccache/releases/download/v${CCACHE_VERSION}/ccache-${CCACHE_VERSION}.tar.gz && \
+    tar -xf ccache-${CCACHE_VERSION}.tar.gz && \
+    cd ccache-${CCACHE_VERSION} && \
+    ./configure && \
+    make -j$(getconf _NPROCESSORS_ONLN) && \
+    make install && \
+    cd .. && \
+    rm -rf ccache-${CCACHE_VERSION}.tar.gz
+
+# GitHub Actions user`s UID is 1001
+RUN useradd ci -m -s /bin/bash -G users --uid=1001 && \
+    mkdir /io && \
+    chown -R ci:ci /io && \
+    # This needs to find ffmpeg packages from ci user
+    chown -R ci:ci /ffmpeg_build && \
+    # This calls in mutlibuild scripts and cannot be run without permissions
+    chown -R ci:ci /opt/_internal/pipx/venvs/auditwheel
+
+USER ci
+
+# Git security vulnerability: https://github.blog/2022-04-12-git-security-vulnerability-announced
+RUN git config --global --add safe.directory /io
 
-ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig:/root/ffmpeg_build/lib/pkgconfig
-ENV LDFLAGS -L/root/ffmpeg_build/lib
+ENV PKG_CONFIG_PATH /usr/local/lib/pkgconfig:/ffmpeg_build/lib/pkgconfig
+ENV LDFLAGS -L/ffmpeg_build/lib
 ENV PATH "$HOME/bin:$PATH"
diff --git a/multibuild b/multibuild
index 8882150d..bce1637e 160000
--- a/multibuild
+++ b/multibuild
@@ -1 +1 @@
-Subproject commit 8882150df6529658700b66bec124dfb77eefca26
+Subproject commit bce1637e202cb52b0e7ea42baa1cccc894b82806
diff --git a/opencv b/opencv
index ad6e8294..b0dc4741 160000
--- a/opencv
+++ b/opencv
@@ -1 +1 @@
-Subproject commit ad6e82942b37be8ee2c71c1d9bc7fe79cd16f7ab
+Subproject commit b0dc474160e389b9c9045da5db49d03ae17c6a6b
diff --git a/opencv_contrib b/opencv_contrib
index d5317d62..db16caf6 160000
--- a/opencv_contrib
+++ b/opencv_contrib
@@ -1 +1 @@
-Subproject commit d5317d6297a8129b66dba1a1f7cc784e94639da9
+Subproject commit db16caf6ceee76b43b94c846be276e92a43e9700
diff --git a/opencv_extra b/opencv_extra
index d5c7212d..936854e2 160000
--- a/opencv_extra
+++ b/opencv_extra
@@ -1 +1 @@
-Subproject commit d5c7212d53f097c9fdf5e72c598ad051660599e8
+Subproject commit 936854e2b666853d6d0732a8eabc2d699f4fa3d8
diff --git a/patch_auditwheel_whitelist.py b/patch_auditwheel_whitelist.py
index d0cbf5b2..b32da17a 100644
--- a/patch_auditwheel_whitelist.py
+++ b/patch_auditwheel_whitelist.py
@@ -5,12 +5,11 @@
 
 policies = None
 
-with open(join(dirname(abspath(policy.__file__)), "policy.json")) as f:
+with open(join(dirname(abspath(policy.__file__)), "manylinux-policy.json")) as f:
     policies = json.load(f)
 
 for p in policies:
-    if p["name"] == "manylinux2014":
-        p["lib_whitelist"].append("libxcb.so.1")
+    p["lib_whitelist"].append("libxcb.so.1")
 
-with open(join(dirname(abspath(policy.__file__)), "policy.json"), "w") as f:
+with open(join(dirname(abspath(policy.__file__)), "manylinux-policy.json"), "w") as f:
     f.write(json.dumps(policies))
diff --git a/patches/patchQtPlugins b/patches/patchQtPlugins
index 03560f17..a05a5f83 100644
--- a/patches/patchQtPlugins
+++ b/patches/patchQtPlugins
@@ -3,9 +3,8 @@ index 4c0b3880fc..dffa0a4caa 100644
 --- a/opencv/CMakeLists.txt
 +++ b/opencv/CMakeLists.txt
 @@ -1187,6 +1187,13 @@ if(WITH_QT OR HAVE_QT)
-   if(HAVE_QT5)
-     status("    QT:" "YES (ver ${Qt5Core_VERSION_STRING})")
-     status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${Qt5OpenGL_LIBRARIES} ${Qt5OpenGL_VERSION_STRING})" ELSE NO)
+   if(HAVE_QT)
+     status("    QT:" "YES (ver ${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH} ${QT_EDITION})")
 +    if(APPLE)
 +      install(DIRECTORY ${Qt5_DIR}/../../../plugins DESTINATION lib/qt)
 +    endif()
@@ -13,6 +12,14 @@ index 4c0b3880fc..dffa0a4caa 100644
 +      install(DIRECTORY /opt/Qt5.15.0/plugins DESTINATION lib/qt)
 +      install(DIRECTORY /usr/share/fonts DESTINATION lib/qt)
 +    endif()
-   elseif(HAVE_QT)
-     status("    QT:" "YES (ver ${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH} ${QT_EDITION})")
-     status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${QT_QTOPENGL_LIBRARY})" ELSE NO)
+     if(HAVE_QT_OPENGL)
+       if(Qt${QT_VERSION_MAJOR}OpenGL_LIBRARIES)
+         status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${Qt${QT_VERSION_MAJOR}OpenGL_LIBRARIES} ${Qt${QT_VERSION_MAJOR}OpenGL_VERSION_STRING})" ELSE NO)
+       else()
+         status("      QT OpenGL support:" HAVE_QT_OPENGL THEN "YES (${QT_QTOPENGL_LIBRARY})" ELSE NO)
+       endif()
+     else()
+       status("      QT OpenGL support:" "NO")
+     endif()
+   else()
+     status("    QT:" "NO")
diff --git a/pyproject.toml b/pyproject.toml
index 5a2849f3..ff535e86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,12 @@
 [build-system]
 requires = [
-  "setuptools", "wheel", "scikit-build", "cmake", "pip",
+  "setuptools==59.2.0", "wheel==0.37.0", "cmake>=3.1", "pip",
+  "scikit-build>=0.13.2",
   "numpy==1.13.3; python_version=='3.6' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
-  "numpy==1.19.3; python_version>='3.6' and sys_platform == 'linux' and platform_machine == 'aarch64'",
-  "numpy==1.21.0; python_version>='3.6' and sys_platform == 'darwin' and platform_machine == 'arm64'",
   "numpy==1.14.5; python_version=='3.7' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
   "numpy==1.17.3; python_version=='3.8' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
-  "numpy==1.19.3; python_version>='3.9' and platform_machine != 'aarch64' and platform_machine != 'arm64'"
+  "numpy==1.19.3; python_version<='3.9' and sys_platform == 'linux' and platform_machine == 'aarch64'",
+  "numpy==1.21.0; python_version<='3.9' and sys_platform == 'darwin' and platform_machine == 'arm64'",
+  "numpy==1.19.3; python_version=='3.9' and platform_machine != 'aarch64' and platform_machine != 'arm64'",
+  "numpy==1.21.2; python_version>='3.10'"
 ]
diff --git a/scripts/__init__.py b/scripts/__init__.py
new file mode 100644
index 00000000..587a42bf
--- /dev/null
+++ b/scripts/__init__.py
@@ -0,0 +1,24 @@
+PYTHON_EXTENSIONS_PATHS = [
+    LOADER_DIR
+] + PYTHON_EXTENSIONS_PATHS
+
+ci_and_not_headless = False
+
+try:
+    from .version import ci_build, headless
+
+    ci_and_not_headless = ci_build and not headless
+except:
+    pass
+
+# the Qt plugin is included currently only in the pre-built wheels
+if sys.platform.startswith("linux") and ci_and_not_headless:
+    os.environ["QT_QPA_PLATFORM_PLUGIN_PATH"] = os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), "qt", "plugins"
+    )
+
+# Qt will throw warning on Linux if fonts are not found
+if sys.platform.startswith("linux") and ci_and_not_headless:
+    os.environ["QT_QPA_FONTDIR"] = os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), "qt", "fonts"
+    )
diff --git a/setup.py b/setup.py
index 612a080c..11014d6b 100644
--- a/setup.py
+++ b/setup.py
@@ -22,24 +22,15 @@ def main():
     build_headless = get_build_env_var_by_name("headless")
     build_java = "ON" if get_build_env_var_by_name("java") else "OFF"
 
-    if sys.version_info[:2] >= (3, 6):
-        minimum_supported_numpy = "1.13.3"
-    if sys.version_info[:2] >= (3, 7):
-        minimum_supported_numpy = "1.14.5"
-    if sys.version_info[:2] >= (3, 8):
-        minimum_supported_numpy = "1.17.3"
-    if sys.version_info[:2] >= (3, 9):
-        minimum_supported_numpy = "1.19.3"
-
-    # linux arm64 is a special case
-    if sys.platform.startswith("linux") and sys.version_info[:2] >= (3, 6) and platform.machine() == "aarch64":
-        minimum_supported_numpy = "1.19.3"
-
-    # macos arm64 is a special case
-    if sys.platform == "darwin" and sys.version_info[:2] >= (3, 6) and platform.machine() == "arm64":
-        minimum_supported_numpy = "1.21.0"
-
-    numpy_version = "numpy>=%s" % minimum_supported_numpy
+    install_requires = [
+        'numpy>=1.13.3; python_version<"3.7"',
+        'numpy>=1.14.5; python_version>="3.7"',
+        'numpy>=1.17.3; python_version>="3.8"',
+        'numpy>=1.19.3; python_version>="3.9"',
+        'numpy>=1.21.2; python_version>="3.10"',
+        'numpy>=1.19.3; python_version>="3.6" and platform_system=="Linux" and platform_machine=="aarch64"',
+        'numpy>=1.21.2; python_version>="3.6" and platform_system=="Darwin" and platform_machine=="arm64"',
+    ]
 
     python_version = cmaker.CMaker.get_python_version()
     python_lib_path = cmaker.CMaker.get_python_library(python_version).replace(
@@ -69,7 +60,7 @@ def main():
     )
 
     # https://stackoverflow.com/questions/1405913/python-32bit-or-64bit-mode
-    x64 = sys.maxsize > 2 ** 32
+    is64 = sys.maxsize > 2 ** 32
 
     package_name = "opencv-python"
 
@@ -97,7 +88,7 @@ def main():
     # Path regexes with forward slashes relative to CMake install dir.
     rearrange_cmake_output_data = {
         "cv2": (
-            [r"bin/opencv_videoio_ffmpeg\d{3}%s\.dll" % ("_64" if x64 else "")]
+            [r"bin/opencv_videoio_ffmpeg\d{3}%s\.dll" % ("_64" if is64 else "")]
             if os.name == "nt"
             else []
         )
@@ -106,12 +97,32 @@ def main():
         # Naming conventions vary so widely between versions and OSes
         # had to give up on checking them.
         [
-            "python/cv2[^/]*%(ext)s"
-            % {"ext": re.escape(sysconfig.get_config_var("EXT_SUFFIX"))}
+            r"python/cv2/python-%s/cv2.*"
+            % (sys.version_info[0])
+        ]
+        +
+        [
+            r"python/cv2/__init__.py"
+        ]
+        +
+        [
+            r"python/cv2/.*config.*.py"
         ],
         "cv2.data": [  # OPENCV_OTHER_INSTALL_PATH
             ("etc" if os.name == "nt" else "share/opencv4") + r"/haarcascades/.*\.xml"
         ],
+        "cv2.gapi": [
+            "python/cv2" + r"/gapi/.*\.py"
+        ],
+        "cv2.mat_wrapper": [
+            "python/cv2" + r"/mat_wrapper/.*\.py"
+        ],
+        "cv2.misc": [
+            "python/cv2" + r"/misc/.*\.py"
+        ],
+        "cv2.utils": [
+            "python/cv2" + r"/utils/.*\.py"
+        ],
     }
 
     # Files in sourcetree outside package dir that should be copied to package.
@@ -119,7 +130,7 @@ def main():
     files_outside_package_dir = {"cv2": ["LICENSE.txt", "LICENSE-3RD-PARTY.txt"]}
 
     ci_cmake_generator = (
-        ["-G", "Visual Studio 14" + (" Win64" if x64 else "")]
+        ["-G", "Visual Studio 14" + (" Win64" if is64 else "")]
         if os.name == "nt"
         else ["-G", "Unix Makefiles"]
     )
@@ -135,8 +146,6 @@ def main():
             "-DBUILD_opencv_python2=OFF",
             # Disable the Java build by default as it is not needed
             "-DBUILD_opencv_java=%s" % build_java,
-            # When off, adds __init__.py and a few more helper .py's. We use our own helper files with a different structure.
-            "-DOPENCV_SKIP_PYTHON_LOADER=ON",
             # Relative dir to install the built module to in the build tree.
             # The default is generated from sysconfig, we'd rather have a constant for simplicity
             "-DOPENCV_PYTHON3_INSTALL_PATH=python",
@@ -150,7 +159,21 @@ def main():
             "-DBUILD_TESTS=OFF",
             "-DBUILD_PERF_TESTS=OFF",
             "-DBUILD_DOCS=OFF",
+            "-DPYTHON3_LIMITED_API=ON",
+            "-DBUILD_OPENEXR=ON",
         ]
+        + (
+            # CMake flags for windows/arm64 build
+            ["-DCMAKE_GENERATOR_PLATFORM=ARM64",
+             # Emulated cmake requires following flags to correctly detect
+             # target architecture for windows/arm64 build
+             "-DOPENCV_WORKAROUND_CMAKE_20989=ON",
+             "-DCMAKE_SYSTEM_PROCESSOR=ARM64"]
+            if platform.machine() == "ARM64" and sys.platform == "win32"
+            # If it is not defined 'linker flags: /machine:X86' on Windows x64
+            else ["-DCMAKE_GENERATOR_PLATFORM=x64"] if is64 and sys.platform == "win32"
+            else []
+          )
         + (
             ["-DOPENCV_EXTRA_MODULES_PATH=" + os.path.abspath("opencv_contrib/modules")]
             if build_contrib
@@ -168,7 +191,7 @@ def main():
                 "-DWITH_MSMF=OFF"
             )  # see: https://github.com/skvark/opencv-python/issues/263
 
-    if sys.platform.startswith("linux") and not x64 and "bdist_wheel" in sys.argv:
+    if sys.platform.startswith("linux") and not is64 and "bdist_wheel" in sys.argv:
         subprocess.check_call("patch -p0 < patches/patchOpenEXR", shell=True)
 
     # OS-specific components during CI builds
@@ -231,7 +254,7 @@ def main():
         package_data=package_data,
         maintainer="Olli-Pekka Heinisuo",
         ext_modules=EmptyListWithLength(),
-        install_requires=numpy_version,
+        install_requires=install_requires,
         python_requires=">=3.6",
         classifiers=[
             "Development Status :: 5 - Production/Stable",
@@ -252,6 +275,7 @@ def main():
             "Programming Language :: Python :: 3.7",
             "Programming Language :: Python :: 3.8",
             "Programming Language :: Python :: 3.9",
+            "Programming Language :: Python :: 3.10",
             "Programming Language :: C++",
             "Programming Language :: Python :: Implementation :: CPython",
             "Topic :: Scientific/Engineering",
@@ -350,6 +374,13 @@ def _classify_installed_files_override(
 
         print("Copying files from CMake output")
 
+        # add lines from the old __init__.py file to the config file
+        with open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'scripts', '__init__.py'), 'r') as custom_init:
+            custom_init_data = custom_init.read()
+        with open('%spython/cv2/config-%s.py'
+        % (cmake_install_dir, sys.version_info[0]), 'w') as opencv_init_config:
+            opencv_init_config.write(custom_init_data)
+
         for package_name, relpaths_re in cls.package_paths_re.items():
             package_dest_reldir = package_name.replace(".", os.path.sep)
             for relpath_re in relpaths_re:
@@ -371,7 +402,8 @@ def _classify_installed_files_override(
                     final_install_relpaths.append(new_install_relpath)
                     del m, fslash_relpath, new_install_relpath
                 else:
-                    if not found:
+                    # gapi can be missed if ADE was not downloaded (network issue)
+                    if not found and "gapi" not in relpath_re:
                         raise Exception("Not found: '%s'" % relpath_re)
                 del r, found
 
@@ -410,7 +442,7 @@ def _classify_installed_files_override(
             data_files,
             # To get around a check that prepends source dir to paths and breaks package detection code.
             cmake_source_dir="",
-            cmake_install_dir=cmake_install_reldir,
+            _cmake_install_dir=cmake_install_reldir,
         )
 
 
diff --git a/tests/pylintrc b/tests/pylintrc
new file mode 100644
index 00000000..a3892018
--- /dev/null
+++ b/tests/pylintrc
@@ -0,0 +1,12 @@
+# Source: opencv/platforms/scripts/pylintrc
+
+[MESSAGES CONTROL]
+
+# Disable all to choose the Tests one by one
+disable=all
+
+# Tests
+enable=bad-indentation,       # Used when an unexpected number of indentation’s tabulations or spaces has been found.
+       mixed-indentation,     # Used when there are some mixed tabs and spaces in a module.
+       unnecessary-semicolon, # Used when a statement is ended by a semi-colon (”;”), which isn’t necessary.
+       unused-variable        # Used when a variable is defined but not used. (Use _var to ignore var).
diff --git a/travis_config.sh b/travis_config.sh
index a83fe141..366d35ad 100644
--- a/travis_config.sh
+++ b/travis_config.sh
@@ -12,13 +12,16 @@ function build_wheel {
 
 function bdist_wheel_cmd {
     # copied from multibuild's common_utils.sh
-    # add osx deployment target so it doesnt default to 10.6
+    # add osx deployment target so it doesn't default to 10.6
     local abs_wheelhouse=$1
-    CI_BUILD=1 pip wheel --verbose --wheel-dir="$PWD/dist" . $BDIST_PARAMS
+    # install all required packages in pyproject.toml, because bdist_wheel does not do it
+    python${PYTHON_VERSION} -m pip install toml && python${PYTHON_VERSION} -c 'import toml; c = toml.load("pyproject.toml"); print("\n".join(c["build-system"]["requires"]))' | python${PYTHON_VERSION} -m pip install -r /dev/stdin
+    CI_BUILD=1 python${PYTHON_VERSION} setup.py bdist_wheel --py-limited-api=cp36 -v
     cp dist/*.whl $abs_wheelhouse
     if [ -z "$IS_OSX" ]; then
-      TOOLS_PATH=/opt/_internal/tools
-      /opt/python/cp37-cp37m/bin/python -m venv $TOOLS_PATH
+      # this path can be changed in the latest manylinux image
+      TOOLS_PATH=/opt/_internal/pipx/venvs/auditwheel
+      /opt/python/cp39-cp39/bin/python -m venv $TOOLS_PATH
       source $TOOLS_PATH/bin/activate
       python patch_auditwheel_whitelist.py
       deactivate
@@ -47,7 +50,7 @@ if [ -n "$IS_OSX" ]; then
     function generate_ffmpeg_formula {
         local FF="ffmpeg"
         local LFF="ffmpeg_opencv"
-        local FF_FORMULA; FF_FORMULA=$(brew formula "$FF")
+        local FF_FORMULA; FF_FORMULA=$(brew formula "${FF}${FFMPEG_FORMULA_VERSION}")
         local LFF_FORMULA; LFF_FORMULA="$(dirname "$FF_FORMULA")/${LFF}.rb"
 
         local REGENERATE
@@ -67,8 +70,9 @@ if [ -n "$IS_OSX" ]; then
         if [ -n "$REGENERATE" ]; then
             echo "Regenerating custom ffmpeg formula"
             # Bottle block syntax: https://docs.brew.sh/Bottles#bottle-dsl-domain-specific-language
+            # FfmpegAT4 is a class in ffmpeg@4 formula
             perl -wpe 'BEGIN {our ($found_blank, $bottle_block);}
-                if (/(^class )(Ffmpeg)(\s.*)/) {$_=$1.$2."Opencv".$3."\n"; next;}
+                if (/(^class )(FfmpegAT4)(\s.*)/) {$_=$1."FfmpegOpencv".$3."\n"; next;}
                 if (!$found_blank && /^$/) {$_.="conflicts_with \"ffmpeg\"\n\n"; $found_blank=1; next;}
                 if (!$bottle_block && /^\s*bottle do$/) { $bottle_block=1; next; }
                 if ($bottle_block) { if (/^\s*end\s*$/) { $bottle_block=0} elsif (/^\s*sha256\s/) {$_=""} next; }
@@ -92,6 +96,10 @@ function pre_build {
   echo "Starting pre-build"
   set -e -o pipefail
 
+  if [ -n "$IS_OSX" ]; then
+    brew install lapack
+  fi
+
   if [ -n "$IS_OSX" ]; then
     echo "Running for OSX"
 
@@ -99,34 +107,14 @@ function pre_build {
     CACHE_STAGE=
     export HOMEBREW_NO_AUTO_UPDATE=1
 
-    #after the cache stage, all bottles and Homebrew metadata should be already cached locally
-    # if [ -n "$CACHE_STAGE" ]; then
-    #     brew update
-    #     generate_ffmpeg_formula
-    #     brew_add_local_bottles
-    # fi
-
     echo 'Installing FFmpeg'
 
-    # if [ -n "$CACHE_STAGE" ]; then
-    #     brew_install_and_cache_within_time_limit ffmpeg_opencv || { [ $? -gt 1 ] && return 2 || return 0; }
-    # else
-        brew update
-        generate_ffmpeg_formula
-        brew_add_local_bottles
-        # brew unlink python@2
-        brew install --build-bottle ffmpeg_opencv
-    # fi
-
-    # echo 'Installing qt5'
-
-    # if [ -n "$CACHE_STAGE" ]; then
-    #    echo "Qt5 has bottle, no caching needed"
-    # else
-    #    brew switch qt 5.13.2
-    #    brew pin qt
-    #    export PATH="/usr/local/opt/qt/bin:$PATH"
-    # fi
+    brew update
+    generate_ffmpeg_formula
+    brew_add_local_bottles
+    brew install --build-bottle ffmpeg_opencv
+    # It needs when we use not the latest ffmpeg formula
+    brew link ffmpeg_opencv
 
     if [ -n "$CACHE_STAGE" ]; then
         brew_go_bootstrap_mode 0
@@ -148,37 +136,37 @@ function run_tests {
 
     PYTHON=python$PYTHON_VERSION
 
-    if [ -n "$IS_OSX" ]; then
-      echo "Running for OS X"
-
-      cd ../tests
-      $PYTHON get_build_info.py
-
-      cd ../opencv/
-      export OPENCV_TEST_DATA_PATH=../opencv_extra/testdata
-    else
-      echo "Running for linux"
-
-      if [ $PYTHON == "python3.6" ]; then
-        $PYTHON -m pip install -U numpy==1.19.4
-      fi
-      cd /io/tests
-      $PYTHON get_build_info.py
+    echo "Running for linux"
 
-      cd /io/opencv
-      export OPENCV_TEST_DATA_PATH=/io/opencv_extra/testdata
+    if [ $PYTHON == "python3.6" ]; then
+      $PYTHON -m pip install -U numpy==1.19.4
     fi
+    cd /io/tests
+    $PYTHON get_build_info.py
+
+    cd /io/opencv
+    export OPENCV_TEST_DATA_PATH=/io/opencv_extra/testdata
 
     test_wheels
+    pylint_test
 }
 
 function test_wheels {
 
-    echo "Starting tests..."
+    echo "Starting OpenCV tests..."
 
     #Test package
     $PYTHON modules/python/test/test.py -v --repo .
 }
 
+function pylint_test {
+
+    echo "Starting Pylint tests..."
+
+    $PYTHON -m pip install pylint==2.12.2
+    cd /io/tests
+    $PYTHON -m pylint /io/opencv/samples/python/squares.py
+}
+
 export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
 set -x
diff --git a/travis_multibuild_customize.sh b/travis_multibuild_customize.sh
index 5a9451be..178fd6ec 100644
--- a/travis_multibuild_customize.sh
+++ b/travis_multibuild_customize.sh
@@ -3,4 +3,4 @@
 export PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
 set -x
 REPO_DIR=$(dirname "${BASH_SOURCE[0]}")
-DOCKER_IMAGE='quay.io/skvark/manylinux2014_$plat'
+DOCKER_IMAGE='quay.io/asenyaev/manylinux2014_$plat'
diff --git a/travis_osx_brew_cache.sh b/travis_osx_brew_cache.sh
index 401265f2..1a2a1c6c 100644
--- a/travis_osx_brew_cache.sh
+++ b/travis_osx_brew_cache.sh
@@ -249,7 +249,7 @@ function _brew_install_and_cache_within_time_limit {
     for dep in $DEPS; do
         #TIME_LIMIT only has to be met if we'll be actually building the main project this iteration, i.e. after the "root" module installation
         #While we don't know that yet, we can make better use of Travis-given time with a laxer limit
-        #We still can't overrun TIME_HARD_LIMIT as that would't leave time to save the cache
+        #We still can't overrun TIME_HARD_LIMIT as that wouldn't leave time to save the cache
         _brew_install_and_cache_within_time_limit "$dep" $(((TIME_LIMIT+TIME_HARD_LIMIT)/2)) "$TIME_HARD_LIMIT" "$TIME_START" || return $?
     done