View Single Post
Old 28th January 2019, 20:45   #24  |  Link
benwaggoner
Moderator
 
Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
The broader problem is that no one is using H.264 for HDR 4K. HEVC is much more efficient for that kind of encoding, and there are plenty of HDR capable devices out there that can decode 10-bit HEVC but only 8-bit H.264. The only reason I could see to encode H.264 for HDR is if targeting a specific bit of oddball hardware that requires it. But a HDR H.264 stream will not work in many places where HDR HEVC would. And even when it worked well, it would still requires >2x the bitrate for 2160p 10-bit HDR. There is no --hdr-opt for x264 like there is in x265, for example.
__________________
Ben Waggoner
Principal Video Specialist, Amazon Prime Video

My Compression Book
benwaggoner is offline   Reply With Quote