@hunterjm I had just started testing this, currently looking to see if I have a supported camera.

On my dev instance of HA I have things running on a raspberry pi. When attempting to start HA with stream: in my configuration I got the following error:

2019-03-12 08:49:59 ERROR (SyncWorker_5) [homeassistant.util.package] Unable to install package av==6.1.2: Command "/home/pi/home-assistant/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-udfl2b3t/av/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-ftn5zmh2/install-record.txt --single-version-externally-managed --compile --install-headers /home/pi/home-assistant/include/site/python3.6/av" failed with error code 1 in /tmp/pip-install-udfl2b3t/av/
2019-03-12 08:49:59 ERROR (MainThread) [homeassistant.requirements] Not initializing stream because could not install requirement av==6.1.2
2019-03-12 08:49:59 ERROR (MainThread) [homeassistant.setup] Setup failed for stream: Could not install all requirements.

After a little bit of googling the following commands allowed me to get past this error, so I think a note for manual install users would be helpful here:

sudo apt-get install -y python-dev pkg-config

sudo apt-get install -y libavformat-dev libavcodec-dev libavdevice-dev libavutil-dev libswscale-dev libavresample-dev libavfilter-dev

If you think its out of scope for this PR I will submit a change but I think it may be helpful to some users to get in the first release :)

@dshokouhi - The pyAV package is also available pre-built on https://www.piwheels.org/, which Hassbian has as a default package source, I believe. Maybe we can add a note to add that? Can you try removing those packages and installing from piwheels?

@hunterjm it looks like wheels is not supported on python 3.6? I have Python 3.6.7 on my raspberry pi. I already had the default package source setup on my pi as I had just checked it from the link but it did not grab the packages.

Wheels provided support all Raspberry Pi models (Pi 3, Pi 2, Pi 1 and Pi Zero). Wheels are provided for Python 3.4 and 3.5. We plan to add support for Python 3.6, 3.7 and 2.7.

When I attempt remove the installed packages and try again I get the same error about it being unable to find the packages. Below is part of the error when I try to manually install pyAV, when I grab the packages I linked above the install works fine.

    Could not find libavformat with pkg-config.
    Could not find libavcodec with pkg-config.
    Could not find libavdevice with pkg-config.
    Could not find libavutil with pkg-config.
    Could not find libavfilter with pkg-config.
    Could not find libswscale with pkg-config.
    Could not find libswresample with pkg-config.

I can provide the full error but don't want to spam this PR.

Ok. Good to know that piwheels doesn’t support 3.6 and 3.7.

I think we can add a warning message in the docs, but upon release it should work out of the box in new hassbian installs, HASS.io, and the official docker image.

ok I will just add the note for manual installers who run into the error on how to fix it once this PR gets merged :)