frontends/va: Parse H264 SPS for video signal parameters
What does this MR do and why?
frontends/va: Parse H264/HEVC SPS for video signal parameters
Since packed headers support is now advertised for H264, it also fixes encoding into mkv with ffmpeg.
Closes: #3524 (closed)
There is couple TODOs skipping parsing things that are probably not needed.
cc @rdong
Edited by David Rosca