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author | wm4 <wm4@nowhere> | 2013-07-14 23:44:50 +0200 |
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committer | wm4 <wm4@nowhere> | 2013-07-14 23:44:50 +0200 |
commit | 65d8709152c5e3942e1a4db958be7cae80ea05b0 (patch) | |
tree | d40bddf44bf69f53319ff9d664e24ea90082a5be /DOCS | |
parent | e18ffd6b998858ca0797cb0ce4aabd4a509655dd (diff) | |
download | mpv-65d8709152c5e3942e1a4db958be7cae80ea05b0.tar.bz2 mpv-65d8709152c5e3942e1a4db958be7cae80ea05b0.tar.xz |
demux_lavf: add terrible hack to make DVD playback just work
DVD playback had some trouble with PTS resets: libavformat's genpts
feature would try reading until EOF (worst case) to find a new usable
PTS in case a packet's PTS is not set correctly. Especially with slow
DVD access, this would make the player to appear frozen.
Reimplement it partially in demux_lavf.c, and use that code in the DVD
case. This is heavily "inspired" by the code in av_read_frame from
libavformat/utils.c. The difference is that we stop reading if no PTS
has been found after 50 packets (consider this a heuristic). Also, we
don't bother with the PTS wrapping and last-frame-before-EOF handling.
Even with normal PTS wraps, the player frontend will go to hell for the
duration of a frame anyway, and should recover quickly after that.
The terribleness of this commit is mostly that we duplicate libavformat
functionality, and that we suddenly need a packet queue.
Diffstat (limited to 'DOCS')
-rw-r--r-- | DOCS/man/en/options.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/DOCS/man/en/options.rst b/DOCS/man/en/options.rst index 58fc365db1..66cdadd120 100644 --- a/DOCS/man/en/options.rst +++ b/DOCS/man/en/options.rst @@ -559,6 +559,16 @@ ``--demuxer-lavf-format=<value>`` Force a specific libavformat demuxer. +``--demuxer-lavf-genpts-mode=<auto|lavf|builtin|no>`` + Mode for deriving missing packet PTS values from packet DTS. ``lavf`` + enables libavformat's ``genpts`` option. ``builtin`` enables equivalent + code in mpv. ``auto`` will enable either lavf (normal playback) or builtin + (DVD playback) in correct-pts mode. The difference between them is that + the builtin code will not potentially read until EOF trying to derive the + PTS (which is very bad for DVD playback). On the other hand, builtin might + give up too early, which is why lavf is preferred normally. ``no`` disables + both. + ``--demuxer-lavf-o=<key>=<value>[,<key>=<value>[,...]]`` Pass AVOptions to libavformat demuxer. |