delayed and mistimed frames on AMD, Wayland (not on Xorg), Gnome

[ghost]

Important Information

Provide following Information:

• mpv version 0.34.1
  FFmpeg library versions:
  libavutil 57.17.100
  libavcodec 59.18.100
  libavformat 59.16.100
  libswscale 6.4.100
  libavfilter 8.24.100
  libswresample 4.3.100
  FFmpeg version: 5.0.1

• Linux Distribution and Version: Fedora 36

• Source of the mpv binary: RPM Fusion

• Window Manager and version: GNOME Display Manager 42.0

• GPU driver and version: amd-gpu-firmware.noarch 20221012-141.fc36

Reproduction steps

mpv --no-config --mute=yes --video-sync=display-resample --fs=yes --log-file=/tmp/mpv.txt 

Play the file, inspect the stats (the I key).

Expected behavior

No delayed and mistimed frames.

Actual behavior

Frequent delayed and mistimed frames, clear stuttering every few seconds with or without video-sync=display-resample. Some dropped frames.

Log file

mpv.txt

[Dudemanguy]

Does this happen if you use xorg? What about if you compile mpv from master?

[ghost]

@Dudemanguy I apologize for the major delay. I reproduced now with mpv 0.35.0 and Fedora 37, Wayland and Xorg. Xorg appears to only get dropped/delayed/mistimed frames at the start of playback, within a handful of seconds.

mpv --no-config --mute=yes --video-sync=display-resample --fs=yes --log-file=/tmp/mpv.txt

mpv 0.35.0 and Fedora 37, Wayland:
mpv.txt

mpv 0.35.0 and Fedora 37, Xorg: mpv.txt

---

• mpv 0.35.0 Copyright © 2000-2022 mpv/MPlayer/mplayer2 projects
  built on UNKNOWN
  FFmpeg library versions:
  libavutil 57.28.100
  libavcodec 59.37.100
  libavformat 59.27.100
  libswscale 6.7.100
  libavfilter 8.44.100
  libswresample 4.7.100
  FFmpeg version: 5.1.2

• Linux Distribution and Version: Fedora 37

• Source of the mpv binary: RPM Fusion

• Window Manager and version: GNOME Display Manager 43.0

• GPU driver and version: amd-gpu-firmware.noarch 20221109-144.fc37

@sfan5 Can you please reopen the issue?

[Dudemanguy]

I tried GNOME 43.1 briefly and could not reproduce (RX 550 and also upscaling to 4k).

[ghost]

around 15 minutes of Gemini Man (4K at 59.940fps) playback:

Xorg: mpv.txt
Wayland: mpv.txt

mpv --no-config --mute=yes --video-sync=display-resample --fs=yes --log-file=/tmp/mpv.txt ~/Videos/Gemini.Man.2019.UHD.BluRay.2160p.TrueHD.Atmos.7.1.HEVC.REMUX.mkv 

[Dudemanguy]

Do you see this behavior in any other compositor (sway/wlroots, weston, etc.)?

[ghost]

Closing as stale — sorry for taking the contributors' time. I'm not absolutely certain which RPM Fusion packages are needed for optimal playback on Fedora and I've only ever played video at 60Hz (seemingly not trivial to automate switching on Wayland). At least any judder isn't obvious with 24P content anymore (I watched 'Invisible Demons' (2021) recently, has prominent tracking shots).

I'll likely get a dedicated video playback machine and try to report back whether the issue persists or not.

[ghost]

this report was created on the same hardware, may be considered as the same issue: #9924