[FFmpeg-devel] [PATCH 13/18] h264_sei: parse the picture timing SEIs correctly

[Kieran Kunhya]

>
> I don't think you read that section carefully enough. What it says (in
> my interpretation) is that an SPS can be activated only by:
> - buffering period SEI
> - a PPS (which is itself activated by picture data)
> Picture timing SEI is neither of those.
>

The contents of pic-struct do not affect activation but have dependent
syntax elements.
So for example a Buffering Period SEI could activate an SPS and then
followed by pic-struct and pic struct would then have a dependency on the
activated SPS.
This SPS could be different to the one the VCL data refers to. I think
there are other corner cases as well.

Kieran