FFmpeg/X264: Split video mid-GOP without reencoding entire stream

Question

I've got an H264 video (Stored in an MP4 file). Each GOP is approx 10s long. I want to trim the first couple of seconds off the video, which means I need to split the first GOP. Is there a way to do this without re-encoding the entire video?

I've got FFmpeg and x264 available. I'm happy to use either the FFmpeg command line, or my own program linked against ffmpeg of x264 libraries.

Answer 1

FFVhuff is lossless codec

ffmpeg -i input.mkv -c:v ffvhuff FFVhuff.mkv

ffmpeg -ss 26.818 -i FFVhuff.mkv trim.mkv

http://svnpenn.blogspot.com/2011/10/ffmpeg-cut-to-frame-same-audio.html