public Video2Frame2Video(string inputFile, string outputFile) { using (MediaReader reader = new MediaReader(inputFile)) using (MediaWriter writer = new MediaWriter(outputFile)) { var videoIndex = reader.Where(_ => _.Codec.AVCodecContext.codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO).First().Index; writer.AddStream(reader[videoIndex]); writer.Initialize(); PixelConverter pixelConverter = new PixelConverter(writer.First().Codec); foreach (var packet in reader.ReadPacket()) { foreach (var frame in reader[videoIndex].ReadFrame(packet)) { foreach (var dstFrame in pixelConverter.Convert(frame)) { foreach (var dstPacket in writer[0].WriteFrame(dstFrame)) { writer.WritePacket(dstPacket); } } } } writer.FlushMuxer(); } }