FPS 29.97003/23.97602 (specified) VP9 (when 1080p is max res) breaks youtube skip/seek function (mpv+yt-dlp)

[geextahslex]

mpv Information

mpv v0.38.0-567-g68a1a387 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Jun 29 2024 00:14:07
libplacebo version: v7.349.0 (v7.349.0-rc1-3-g1fd3c7b-dirty)
FFmpeg version: N-116052-gd5e603ddc
FFmpeg library versions:
   libavcodec      61.9.100
   libavdevice     61.2.100
   libavfilter     10.2.102
   libavformat     61.4.100
   libavutil       59.27.100
   libswresample   5.2.100
   libswscale      8.2.100

Other Information

• Windows version: Windows 10 22H2 Build 19045.4170)
• GPU model, driver and version: intel HD Graphics 4600, driver: 20.19.15.5171
• Source of mpv: https://sourceforge.net/projects/mpv-player-windows/files/
• Introduced in version: present since v37.0/38 and latest
• Source of yt-dlp: https://github.com/yt-dlp/yt-dlp-nightly-builds
• yt-dlp version: yt-dlp nightly 2024.06.29.232730

Reproduction Steps

run: mpv "https://www.youtube.com/watch?v=PgHZ4itvgVs" or any FPS 29.97003 VP9 youtube video and try to skip/seek forward

Expected Behavior

video can use skip/seek and works normally

Actual Behavior

video can't be skipped forward/use seek. If you use it the video hangs/stops playback.

Log File

gpu-debug output.txt full log output.txt

Sample Files

after using seek, video stops and cache is at 0 for a while after a while cache starts again but there is still no playback

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

• [X] I tested with the latest mpv version to validate that the issue is not already fixed.
• [X] I provided all required information including system and mpv version.
• [X] 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.
• [X] I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• [X] I attached the full, untruncated log file.
• [X] I attached the backtrace in the case of a crash.

[guidocella]

Duplicate of https://github.com/mpv-player/mpv/issues/13033

[geextahslex]

It looks like videos with FPS 29.97003/23.97602 (specified) VP9 and only if 1080p is available, have this issue

[Obegg]

this looks like the same issue (I opened), I just wish you posted the full log file so I can at least confirm if this error shows up:

[  14.613][d][cplayer] video EOF (status=4)

[geextahslex]

Here full logfile output.txt

[Obegg]

Mmmm, I am not sure but I think it's not the same issue (I don't see the video EOF lines)

[geextahslex]

@SnnUntz provided a solution/workaround.

These can be used to solve the issue. ytdl-raw-options = format-sort="proto" or ytdl-raw-options = extractor-args="youtube:skip=hls" or ytdl-format = "(bv*+ba/b)[protocol^=http][protocol!*=dash] / (bv*+ba/b)"

The bug occurs when using the m3u8 protocol.