[FFmpeg-devel] ProRes Bitstream Version

[Martin Vignali]

>
> I'm new to the list, so I would like to first thank you for the great work
> of ffmpeg.
>
> I would like to report a bug on bitstream version on encoded ProRes output.
> Currently, ffmpeg always encode with bitstream version 0 even for 4444
> (with alpha channel). According to RDD36-2015:
>
> > Version 0 bitstreams will have a value of 2 (4:2:2 sampling) for the
> chroma_format syntax element and a value of 0 (no encoded alpha) for the
> alpha_channel_type element; version 1 bitstreams can have any permissible
> value for those elements.
>
> In other words, if alpha channel is encoded, it should have bitstream
> version 1. Thanks!
>
>
Hello,

Bug report is a better place to report this (https://trac.ffmpeg.org/)
But thanks for pointing this.
I will send a patch later for fixing bitstream version for 4444 (with and
without alpha,  4444 without alpha also need version 1).

Martin