Cached progress disappears on subtitle change
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core:option-param-conf
core:stream
core:subtitle
- Dominant language
- C
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Description
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
Contributor guide
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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 HTTP MKV case with mpv --no-config --log-file=output.txt, including --playlist=file --prefetch-playlist, and review the linked log. Trace what happens to cached progress when the embedded subtitle track changes from none to enabled; done means subtitles can be enabled without discarding already cached data.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, linux
- Domain
- cli
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100