[FFmpeg-devel] [PATCH v2 0/3] avcodec: move HDR10 (MDCV/CLL) SEI handling to h2645_sei

[Jan Ekström]

On Thu, Jul 27, 2023 at 12:37 AM Jan Ekström <jeebjp at gmail.com> wrote:
>
> On Tue, Jul 25, 2023 at 10:29 PM Jan Ekström <jeebjp at gmail.com> wrote:
> >
> > This allows parsing code to be re-utilized from H.264, as well as probably
> > from VVC in the future.
> >
> > This additionally eases verification of the AVCodecContext side data patch
> > set, which includes libx264 integration for HDR10 side data.
> >
> > Changes from v1:
> > * Reordered the new h2645_sei include to correct location as per alphabetical
> >   order. Thanks for Leo Izen for noticing this.
> > * Cleaned up the mastering_display_metadata.h include in hevcdec, as that file
> >   no longer directly handles AVContentLightMetadata or
> >   AVMasteringDisplayMetadata.
> >
> > Notes:
> > * In addition to testing with FATE, looking at the show_frames ffprobe output
> >   for a UHD BD sample with each IRAP containing these SEI entries, the
> >   behavior is the same as before with regards to each frame having the side
> >   data persist.
> >
> >   There is also no change with tests I've done with a UHD BD mp4 remux as well
> >   as an iphone 12 sample I had around, So I think I have not modified the HEVC
> >   behavior in any great manner.
> > * As for H.264, it now automatically gains support for these SEI messages. It
> >   seems like its definition of CVS (coded video sequence) is from one IDR to
> >   another (essentially a GOP). That said, currently the decoder resets the SEI
> >   setup in decode_nal_units, which means that the side data only persist for
> >   a single frame.
> >
>
> Unless there are objections, I will apply this tomorrow evening as
> this is a strict improvement over the current situation where the
> parsing is limited to HEVC and at least checking with ffprobe does not
> show regressions for HEVC.
>

Applied the set as 33358b862c8b796362218f12555e351aaf35a8f4 ,
43e63ff20a51e0296c446a9deec613df6fd52cb8 and
91e1d11d1405f325f6f52e2c8dd5bbbf2462e190.

Jan