- State your platform and mpv version.
- Make sure you're actually using the latest mpv release. Linux distributions in particular love redistributing ancient and unmaintained mpv releases.
- Attach a log file made with
-vor--log-file=output.txt. - Avoid attaching text files packed in archive files (zip/rar/...), unless explicitly asked so. There are better means, such as using http://sprunge.us
- If you think this is file specific, upload a sample file and link it.
- Don't report multiple unrelated/barely related bugs in one issue.
- If you don't get a reply after days, be sure to post a new message to the issue - it could have been overlooked or forgotten.
- Read: https://mpv.io/bug-reports/
Preferably, asking questions should be done via IRC (#mpv on irc.freenode.net), but asking questions by opening a github issue is also barely tolerated.
When asking on IRC (#mpv on irc.freenode.net), don't ask to ask, just state your problem. Stay long enough until someone gets a chance to reply. Sometimes it can take hours.
See: https://github.com/mpv-player/mpv/blob/master/DOCS/contribute.md
In particular, be aware that all changes to GPL code must come with the implicit agreement that they might be LGPLv2.1+ relicensed at a later point.