Frame stepping is broken with gpu-next and interpolation
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- Dominant language
- C
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Description
The issue should be the same bug as #10107, however it shows a more broken output, and it adds Windows as another reproducible platform
Important Information
Provide following Information:
- mpv version
mpv 0.35.0-62-gcb15bc4324 Copyright © 2000-2022 mpv/MPlayer/mplayer2 projects
built on Sun Dec 25 12:21:50 2022
libplacebo version: v5.229.1-49-g22ce304
FFmpeg version: git-2022-12-24-f8a2a6507
FFmpeg library versions:
libavutil 57.43.100
libavcodec 59.55.103
libavformat 59.34.102
libswscale 6.8.112
libavfilter 8.53.100
libswresample 4.9.100
- Windows Version - Win 11 22H2
- Source of the mpv binary - Shinchiro x64v3
- If known which version of mpv introduced the problem - Unknown
- Possible screenshot or video of visual glitches
If you're not using git master or the latest release, update.
Releases are listed here: https://github.com/mpv-player/mpv/releases
Reproduction steps
- ffmpeg -f lavfi -i testsrc=duration=10:size=1280x720:rate=24:n=2 testsrc.mkv
- mpv testsrc.mkv --no-config --vo=gpu-next --video-sync=display-resample --interpolation --log-file=framesteplog.txt
- Hover onto OSC as it forces frame refresh
- Press . and , to frame-step.
Expected behavior
Normal frame-stepping
Actual behavior
It will either stay on the same frame or skip 2 frames. frame-backstepping back steps successfully before it gets refreshed back to the old frame due to OSC forcing a refresh
Log file
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the issue with the provided ffmpeg testsrc command and the mpv gpu-next, display-resample, and interpolation options, then compare the behavior and log with issue #10107. Done means frame-stepping advances or reverses exactly one frame without OSC-triggered refreshes restoring or skipping frames.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- audio-video-rtc, computer-graphics
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100