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author | wm4 <wm4@nowhere> | 2019-05-24 20:09:52 +0200 |
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committer | wm4 <wm4@nowhere> | 2019-09-19 20:37:04 +0200 |
commit | 327f3fc848e6e30d431411e103e10dbae7f461e3 (patch) | |
tree | e2a6bac1d153d926b6b9098d2708a33acefce632 /DOCS | |
parent | 001db94d1e7337d94c9bb573343365c803ed126a (diff) | |
download | mpv-327f3fc848e6e30d431411e103e10dbae7f461e3.tar.bz2 mpv-327f3fc848e6e30d431411e103e10dbae7f461e3.tar.xz |
manpage: document why Vorbis backward playback does not work
The only reasonable solution to this is probably to make discarding of
preroll frames based on timestmaps, instead of frame/packet count. But
then you get issues with video and its dumb timestamp reordering. So for
now, fuck it.
Diffstat (limited to 'DOCS')
-rw-r--r-- | DOCS/man/options.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 0631fd6a12..f2b94a7e1e 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -489,6 +489,13 @@ Playback Control A workaround is to remux to a format like mkv, which enforces packet boundaries. Making mpv cache the entire file in memory also works. + - Backward playback with Vorbis does not work. libavcodec's decoder + discards the first Vorbis packet (after each decoder reset), and the + mechanism behind ``--audio-reversal-buffer`` assumes that it strictly + outputs a frame for each packet fed to it (the mechanism discards output + based on frame count, not timestamps). Since this tries to decode each + frame on its own, the player never gets a usable audio frame. + Tuning: - Remove all ``--vf``/``--af`` filters you have set. Disable deinterlacing. |