[FFmpeg-user] Encode lossless Dirac?

Peter B. pb at das-werkstatt.com
Tue Nov 22 12:27:28 CET 2011


The current git-version of ffmpeg (N-35077-g7876f14) encoded a Dirac
video losslessly, with "libschroedinger" v1.0.9, using the following

ffmpeg -i input-ffv1.avi -an -vcodec libschroedinger -qscale 0 dirac-0.mkv

I've verified that its lossless, using "-f framemd5" and "vimdiff" like
ffmpeg -i dirac-0.mkv -an -f framemd5 dirac-0-checksums.txt
ffmpeg -i input-ffv1.avi -an -f framemd5 input-ffv1-checksums.txt
vimdiff *-checksums.txt

All frames match perfectly with the original.

Thank you very much,

PS: Now I'm *not* posting the full uncut console output, since I just
wanted to close this thread with the information which commands were
successful. I hope it's fine like that?

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