: The video may have been converted from an HDR source to an SDR (Standard Dynamic Range) format using x264, losing the actual HDR benefits but retaining high detail.
To display HDR content correctly, a video file must communicate specific "bright" and "dark" metadata to a display. x264-hdr
You may occasionally see "x264-HDR" listed in file descriptions on forums or review sites like Wccftech . In these cases, the term is usually a or refers to a specific, non-standard workflow: : The video may have been converted from
: 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. In these cases, the term is usually a
: The file might be a 10-bit H.264 encode. While this provides better color graduation than 8-bit, it is still not "true" HDR and often suffers from poor hardware compatibility. Conclusion
x264-HDR: Compatibility and Implementation Challenges Technically, metadata or the specific color spaces (such as BT.2020 or SMPTE 2084) required for a true HDR experience. While x264 is a powerful, open-source library for encoding video into the H.264/AVC format, it is largely considered a legacy choice for HDR content compared to its successor, x265 (HEVC). The Technical Gap