[FFmpeg-user] Decode FFV1 AVI back to DPX

Christoph Gerstbauer christophgerstbauer at gmail.com
Sun Dec 13 11:22:27 CET 2015


here is also a good understanding description of the LOG vs LINEAR issue:

Am 13.12.15 um 02:47 schrieb Peter B.:
> On 12/08/2015 04:15 PM, Dave Rice wrote:
>>> It is indeed possible to decode back to DPX-  I've losslessly
>>> compressed 10bit RGB DPX to FFV1.mkv and back with matching framemd5s
>>> all the way. It's a beautiful thing.
>> But it's some context loss. For instance if the source DPX is logarithmic I'd be skeptical that the ffv1.mkv rendition would present logarithmically.
> I haven't tried it myself, but actually logarithmic should be stored in
> FFV1 as-is.
> The context how to interpret the color information is currently not
> automatically stored, and would therefore have to be provided manually
> when re-transcoding, or when playing back.
> Has anyone tested this yet?
> Kind regards,
> Pb
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