private static void InitialiseTestPattern()
{
_testPattern = new Bitmap(TEST_PATTERN_IMAGE_PATH);
FFmpegInit.Initialise(FfmpegLogLevelEnum.AV_LOG_DEBUG);
//_ffmpegEncoder = new VideoEncoder(AVCodecID.AV_CODEC_ID_VP8, _testPattern.Width, _testPattern.Height, FRAMES_PER_SECOND);
_ffmpegEncoder = new VideoEncoder(AVCodecID.AV_CODEC_ID_H264, _testPattern.Width, _testPattern.Height, FRAMES_PER_SECOND);
Console.WriteLine($"Codec name {_ffmpegEncoder.GetCodecName()}.");
_videoFrameConverter = new VideoFrameConverter(
new Size(_testPattern.Width, _testPattern.Height),
AVPixelFormat.AV_PIX_FMT_BGRA,
new Size(_testPattern.Width, _testPattern.Height),
AVPixelFormat.AV_PIX_FMT_YUV420P);
}