#11457: The order of parsed "Mastering display colour volume SEI message" seems
wrong.
-------------------------------------+-------------------------------------
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 |
-------------------------------------+-------------------------------------
Changes (by James):
* component: ffprobe => undetermined
* resolution: => invalid
* status: new => closed
* version: 6.0 => unspecified
Comment:
The ordering of values in the mdcv SEI message is GBR as per the spec:
{{{
For describing mastering displays that use red, green, and blue colour
primaries, it is suggested that index value c equal to 0 should correspond
to the green primary, c equal to 1 should correspond to the blue primary,
and c equal to 2 should correspond to the red colour primary
}}}
And this is what's coded and therefore exported:
{{{
[trace_headers @] Mastering Display Colour Volume
[trace_headers @] 32 display_primaries_x[0]
1000010001110001 = 33905
[trace_headers @] 48 display_primaries_y[0]
0011111001001001 = 15945
[trace_headers @] 64 display_primaries_x[1]
0010111000110001 = 11825
[trace_headers @] 80 display_primaries_y[1]
1000100110101000 = 35240
[trace_headers @] 96 display_primaries_x[2]
0001101110001001 = 7049
[trace_headers @] 112 display_primaries_y[2]
0000100110001101 = 2445
[trace_headers @] 128 white_point_x
0011110100010010 = 15634
[trace_headers @] 144 white_point_y
0100000001000010 = 16450
[trace_headers @] 160 max_display_mastering_luminance
00000000100110001001011010000000 = 10000000
[trace_headers @] 192 min_display_mastering_luminance
00000000000000000000000000000001 = 1
}}}
If the values are wrong, then whatever generated the SEI message for this
sample is at fault, not ffmpeg's decoder. More so considering that the
Content Light Level Information SEI message is suspiciously all zeroes.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11457#comment:1>
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