Cached progress disappears on subtitle change

[smhmd]

Important Information

• mpv version 0.32.0
• Linux Distribution and Version Linux manjaro 5.6.12-1-MANJARO
• Source of the mpv binary [Arch repository] (https://www.archlinux.org/packages/community/x86_64/mpv/)
• If known which version of mpv introduced the problem n/a
• Window Manager and version dwm-6.2
• GPU driver and version Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
• Possible screenshot or video of visual glitches n/a

Reproduction steps

• command: mpv 'http://example.com/file.mkv' --no-config --log-file=output.txt
• The file is an HTTP link of type MKV
• When the file opens, the subtitle track is set to none. When I enable the embedded subtitle, the cached progress evaporates and the video starts loading the once cached part.
• applicable with a --playlist=file --prefetch-playlist

Expected behavior

Subs get enabled; cached progress remains.

Actual behavior

Subs get enabled; cached progress disappears.

Log file

https://0x0.st/if3M.txt

[ghost]

That is normal and expected. If a track is not selected, the cache won't contain any data for that track. So the file needs to be read again if the track is selected later.

In your case you could just get the subtitle selected by default, with --sid=1 or --slang=eng.

In theory we could always demux and subtitle tracks, and just pretend they're selected/deselected when the user does so. But not sure if that wouldn't conflict with certain use-cases.

[smhmd]

Thanks for the workaround.