Jerky playback when gradually changing speed

Important Information

Provide following Information:

• mpv 051ba909b4107240d643e4793efa2ceb714fd1b4
• Arch Linux
• compiled from source

Reproduction steps

There are a lot of mistimed frames when speeding up or slowing down when holding the right arrow key while using evafast together with --video-sync=display-resample or --video-sync=display-tempo.
It must have something to do with AV sync, because --video-sync=display-desync doesn't have this problem.

Unfortunately the motion in the recordings isn't a good representation of what it actually looks like. That might be a problem with OBS, but at least the mistimed frames can be seen in the stats.

Expected behavior

Motion in the video remains smooth, like is the case with --video-sync=display-desync.

https://github.com/mpv-player/mpv/assets/8932183/5774ac21-185f-4eea-ae0e-4c01acc26631

Actual behavior

Jerky motion due to mistimed frames.

https://github.com/mpv-player/mpv/assets/8932183/f2223d0e-0dc4-47d2-a871-4d4d76c868ee

Log file

evafast_display-sync.txt

Sample files

Any video will do, it's particularly noticeable during panning shots.

Reproduce the issue with evafast while holding the right arrow key and compare --video-sync=display-resample or --video-sync=display-tempo against --video-sync=display-desync. Start by examining evafast_display-sync.txt and the reported playback and mistimed-frame behavior. Done means speed changes produce smooth motion without the mistimed frames.