(This is not the first time that I am slightly
surprised people use FFmpeg to prove that an
encoder of FFmpeg is lossless.)
Do you have any ideas for proving the losslessness with other tools than
ffmpeg?
The Original has LOGARITHMIC 10bit (RGB 10bit log)
FFmpeg does not support logarithmic dpx
afaict.
If this is really a feature that would
help you, it would be possible to force
the "logarithmic" flag on encoding (but
I am not convinced this is really useful).
It could be usefull because I save the metadata (which is not supported
in AVI) seperatelly from the ffv1 avi and encode it back into the DPX
when recreating it.
For this usecase I can use mediainfo to readout the "logarithmic"
information and set a flag at ffmpeg when encoding new DPX files.
(It is of course trivial to read the
information from the file but I wonder
how it would be useful given that FFmpeg
doesn't know what to do with the
information.)
Consider to upload a sample (or post a
gm command line).
Sample link:
http://ul.to/2xhspaaf
Best Regards
Christoph
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