[FFmpeg-devel] 10bit MV-HEVC decoding support

[Danny Hong]

On Fri, Feb 7, 2025 at 5:52 PM Vittorio Giovara <vittorio.giovara at gmail.com>
 wrote:
> As far as I know, 10bit bitdepth is not specified in the MV profile for
> HEVC, therefore, any 10 bit support would be out of standard.

Thanks for the reply.  You are right that the initial versions of the
standard did not specify a 10bit version of the MV profile.  However, in
July 2023, a proposal for the "Multiview Main 10" profile was made, and
currently there are many encoded HDR videos in this profile being streamed
to Apple Vision Pro.  The HTM reference SW
<https://vcgit.hhi.fraunhofer.de/jvet/HTM> already has the support (search
for "JVET_AE0295").  The Dolby FAQ site
<https://professionalsupport.dolby.com/s/article/Dolby-Vision-Profile-20-FAQ>
also mentions this profile.  Then there were other profiles ("Multiview
Extended" and "Multiview Extended 10") proposed, and since "Multiview
Extended 10" can be a superset of "Multiview Main 10", the latest standard
(July 2024) <https://www.itu.int/itu-t/recommendations/rec.aspx?rec=H.265>,
ended up only including the "Extended" profiles.  For the "Extended"
profiles, you can search for "JVET_AH0046" in the ref SW.  Given that there
are already many encoded videos with the "Multiview Main 10" profile, Apple
has submitted a proposal (JVET-AJ0213 in Oct 2024) to bring back the
profile into the standard.