Playback dim when display color space set to Rec. ITU-R BT.2020-1

[low-batt]

mpv Information

mpv v0.39.0-170-g37159a8ee0 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Oct 20 2024 00:54:23
libplacebo version: v7.349.0 (v7.349.0-18-g9e16c86f)
FFmpeg version: n7.1
FFmpeg library versions:
   libavcodec      61.19.100
   libavdevice     61.3.100
   libavfilter     10.4.100
   libavformat     61.7.100
   libavutil       59.39.100
   libswresample   5.3.100
   libswscale      8.3.100

Other Information

- macOS version: macOS 15.0 (24A335)
- Source of mpv: My own build of master using mpv-build
- Introduced in version: Unknown

Reproduction Steps

On a Mac that supports Extended Dynamic Range and is running macOS Sequoia:

• Download a copy of the Apple Advanced stream
  H.264/HEVC/UHD/Dolby Vision/Dolby Digital/Dolby Atmos example from here.
• Under the  menu click on System Settings…
• In the System Settings panel click on Displays
• Change the Color profile setting to be Rec. ITU-R BT.2020-1
• Run mpv like so:
  mpv --no-config --autofit=50% --pause --script-opts-append=osc-visibility=always --start=1:16 --target-colorspace-hint --tone-mapping=auto --target-peak=500 --vo=gpu-next ~/Movies/Advanced\ stream\ H.264:HEVC:UHD:Dolby\ Vision:Dolby\ Digital:Dolby\ Atmos.mp4
• Notice the picture is extremely dark

Expected Behavior

With the Color profile of the display to Rec. ITU-R BT.2020-1 the video looks somewhat similar how it looks when played with the Quicktime Player.

Actual Behavior

With the Color profile of the display to Rec. ITU-R BT.2020-1 the video is so dark that it is hard make out what is being shown. This screenshot shows mpv on top and the Quicktime Player below:

With the Color profile changed back to the default:

This also happens with the Color profile set to Rec. ITU-R BT.709-5. With other Color profile settings this does not occur.

For the screenshots mpv was run like so:

mpv/build/mpv --no-config --gpu-debug --log-file=output.txt --autofit=50% --pause --script-opts-append=osc-visibility=always --start=1:16 --target-colorspace-hint --tone-mapping=auto --target-peak=500 --vo=gpu-next ~/Movies/Advanced\ stream\ H.264\:HEVC\:UHD\:Dolby\ Vision\:Dolby\ Digital\:Dolby\ Atmos.mp4 

This was reported against IINA in issue iina/iina#5218

Log File

output.txt

Sample Files

I downloaded a copy of the Apple Advanced stream example "H.264/HEVC/UHD/Dolby Vision/Dolby Digital/Dolby Atmos streaming" from here.

Media info:

low-batt@urp Movies$ mediainfo Advanced\ stream\ H.264\:HEVC\:UHD\:Dolby\ Vision\:Dolby\ Digital\:Dolby\ Atmos.mp4 
General
Complete name                            : Advanced stream H.264:HEVC:UHD:Dolby Vision:Dolby Digital:Dolby Atmos.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/dby1/iso2/mp41)
File size                                : 291 MiB
Duration                                 : 1 min 38 s
Overall bit rate                         : 24.7 Mb/s
Frame rate                               : 23.976 FPS
Writing application                      : Lavf61.1.100

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L5@High
HDR format                               : SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 1 min 38 s
Source duration                          : 1 min 38 s
Bit rate                                 : 23.0 Mb/s
Maximum bit rate                         : 24.0 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.116
Stream size                              : 270 MiB (93%)
Source stream size                       : 281 MiB (97%)
Title                                    : Core Media Video
Language                                 : English
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : BT.2020
Mastering display luminance              : min: 0.0050 cd/m2, max: 1000 cd/m2
Maximum Content Light Level              : 1375 cd/m2
Maximum Frame-Average Light Level        : 188 cd/m2
Codec configuration box                  : hvcC

Audio
ID                                       : 2
Format                                   : E-AC-3 JOC
Format/Info                              : Enhanced AC-3 with Joint Object Coding
Commercial name                          : Dolby Digital Plus with Dolby Atmos
Codec ID                                 : ec-3
Duration                                 : 1 min 38 s
Bit rate mode                            : Constant
Bit rate                                 : 768 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 9.01 MiB (3%)
Title                                    : Core Media Audio
Service kind                             : Complete Main
Default                                  : Yes
Alternate group                          : 1
Complexity index                         : Not present / 16
Number of dynamic objects                : 15
Bed channel count                        : 1 channel
Bed channel configuration                : LFE
Dialog Normalization                     : -27 dB
compr                                    : -0.28 dB
dialnorm_Average                         : -27 dB
dialnorm_Minimum                         : -27 dB
dialnorm_Maximum                         : -27 dB


low-batt@urp Movies$ 

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

[low-batt]

An IINA user is encountering this without changing the display settings from the default, but so far I've not been able to trigger the problem that way.