[FFmpeg-user] Mathematically lossless MotionJPEG2000 encoding possible?

[Dave Rice]

Hi Christoph,

On Oct 27, 2014, at 4:02 PM, Christoph Gerstbauer <christophgerstbauer at gmail.com> wrote:

> Hello  Carl,
> 
> here is the syntax:
> 
> C:\Users\gersti>ffmpeg -i C:\TESTS\8bit_ffv1_yuv422p.avi -vcodec libopenjpeg C:\TESTS\8bit_jpeg2000_yuv422p.avi

Your encoding looks okay to me, but what process are you using to decode the resulting jpeg2000 file where you notice to color issues. Could you test playback with libopenjpeg:
ffplay -vcodec libopenjpeg -i C:\TESTS\8bit_jpeg2000_yuv422p.avi

>> Finally, please note that ffv1 is faster than libopenjpeg, compresses better and should make significantly less trouble than the so-called "professional" solutions you are being offered. 
> 
> Do you mean "ffv1 is faster/compresses better than libopenjpeg" or
> "ffv1 is faster/compresses better than motionJPEG2000 generally”?

I suspect both are true. 
Dave Rice