private void InitDecoder()
{
    KhrVideoQueue? khrVideoQueue;
    if (!vk!.TryGetDeviceExtension(instance, device, out khrVideoQueue))
    {
        throw new NotSupportedException("VK_KHR_video_queue extension not found.");
    }



    VideoDecodeH264CapabilitiesKHR videoDecodeH264CapabilitiesKHR = new()
    {
        SType = StructureType.VideoDecodeH264CapabilitiesKhr,
    };

    VideoDecodeCapabilitiesKHR videoDecodeCapabilitiesKHR = new()
    {
        SType = StructureType.VideoDecodeCapabilitiesKhr,
        PNext = &videoDecodeH264CapabilitiesKHR,
    };

    VideoCapabilitiesKHR videoCapabilitiesKHR = new()
    {
        SType = StructureType.VideoCapabilitiesKhr,
        PNext = &videoDecodeCapabilitiesKHR,
    };

    VideoDecodeH264ProfileInfoKHR videoDecodeH264ProfileInfoKHR = new()
    {
        SType = StructureType.VideoDecodeH264ProfileInfoKhr,
        StdProfileIdc = StdVideoH264ProfileIdc.Baseline,
        PictureLayout = VideoDecodeH264PictureLayoutFlagsKHR.InterlacedInterleavedLinesBitKhr,
    };

    VideoProfileInfoKHR videoProfileInfoKHR = new()
    {
        SType = StructureType.VideoProfileInfoKhr,
        PNext = &videoDecodeH264ProfileInfoKHR,
        VideoCodecOperation = VideoCodecOperationFlagsKHR.DecodeH264BitKhr,
        ChromaSubsampling = VideoChromaSubsamplingFlagsKHR.Subsampling420BitKhr,
        LumaBitDepth = VideoComponentBitDepthFlagsKHR.Depth8BitKhr,
        ChromaBitDepth = VideoComponentBitDepthFlagsKHR.Depth8BitKhr,
    };

    VideoProfileListInfoKHR videoProfileListInfoKHR = new()
    {
        SType = StructureType.VideoProfileListInfoKhr,
        ProfileCount = 1,
        PProfiles = &videoProfileInfoKHR,
    };

    if (khrVideoQueue!.GetPhysicalDeviceVideoCapabilities(physicalDevice, &videoProfileInfoKHR, out videoCapabilitiesKHR) != Result.Success)
    {
        throw new Exception("failed to get video capabilities..");
    }
}