: HDR typically requires BT.2020 color primaries. Discussions among experts, such as those on r/ffmpeg , note that x264 lacks the necessary support for these HDR-specific color spaces.
: Unlike x264, x265 was built with HDR in mind, allowing for the seamless embedding of HDR10 or Dolby Vision metadata. Why "x264-HDR" Might Appear Online x264-hdr
To display HDR content correctly, a video file must communicate specific "bright" and "dark" metadata to a display. : HDR typically requires BT