#11457: The order of parsed "Mastering display colour volume SEI message" seems
wrong.
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Reporter: SYamaguchi | Owner: (none)
Type: defect | Status: closed
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution: invalid
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Tom Hebb):
I just ran into this issue as well, as it stops most of mpv's gamut
mapping modes from working for videos with non-GBR ordering. I don't agree
that videos with non-GBR ordering are out of spec, though: the spec only
says that GBR ordering is "suggested", and the
[https://testassets.dashif.org/#testvector/details/5a20b70fa5eeda55aa662b96
video that I'm having trouble with] is one of DASH-IF's official HEVC test
vectors.
For what it's worth, GStreamer does the same thing as FFmpeg and
[https://gitlab.freedesktop.org/gstreamer/gstreamer/-/blob/2dc485823ce532e8c08f1c3390cbbe21305509f0/subprojects
/gst-plugins-bad/gst/videoparsers/gsth265parse.c#L608-619 assumes GBR
ordering], but mediainfo
[https://github.com/MediaArea/MediaInfoLib/blob/2cd060cc07d374c41c81593abcd6d15f8f060a62/Source/MediaInfo/File__Analyze_Streams.cpp#L417-L434
detects which primary is which]. I can't find other open source tools that
actually care about the primaries, but there's clearly not a consensus.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11457#comment:2>
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