private IAviVideoStream CreateVideoStream(FourCC codec, int quality)
{
// Select encoder type based on FOURCC of codec
if (codec == CodecIds.Uncompressed)
{
return(writer.AddUncompressedVideoStream(screenWidth, screenHeight));
}
else if (codec == CodecIds.MotionJpeg)
{
// Use M-JPEG based on WPF (Windows only)
return(writer.AddMJpegWpfVideoStream(screenWidth, screenHeight, quality));
}
else if (codec == MJPEG_IMAGE_SHARP)
{
// Use M-JPEG based on the SixLabors.ImageSharp package (cross-platform)
// Included in the SharpAvi.ImageSharp package
return(writer.AddMJpegImageSharpVideoStream(screenWidth, screenHeight, quality));
}
else
{
return(writer.AddMpeg4VcmVideoStream(screenWidth, screenHeight, (double)writer.FramesPerSecond,
// It seems that all tested MPEG-4 VfW codecs ignore the quality affecting parameters passed through VfW API
// They only respect the settings from their own configuration dialogs, and Mpeg4VideoEncoder currently has no support for this
quality: quality,
codec: codec,
// Most of VfW codecs expect single-threaded use, so we wrap this encoder to special wrapper
// Thus all calls to the encoder (including its instantiation) will be invoked on a single thread although encoding (and writing) is performed asynchronously
forceSingleThreadedAccess: true));
}
}