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author | wm4 <wm4@nowhere> | 2012-12-08 20:14:13 +0100 |
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committer | wm4 <wm4@nowhere> | 2012-12-11 00:37:54 +0100 |
commit | 222a5cf7c0a4de094f368f7154122a72312dbf39 (patch) | |
tree | f8189ba3a04192a1ecbf066baa900daecb763787 /DOCS | |
parent | 323eb54b60db4780ca7a9a6de375882eca24becd (diff) | |
download | mpv-222a5cf7c0a4de094f368f7154122a72312dbf39.tar.bz2 mpv-222a5cf7c0a4de094f368f7154122a72312dbf39.tar.xz |
demux_lavf: make minimum probe score customizable, remove lavf_preferred
libavformat wants to read a full ~400KB of data to determine whether
it's really AAC. This causes slow startup with AAC web radio streams [1]
(possible due to a broken initial packet). There are similar issues
with other file formats.
Make the probe "score" (libavformat's mechanism for testing file
formats) configurable with the -lavfdtops:probescore option. This allows
lowering the amount of data read on probing. If the probe score is below
the probescore option value, demux_lavf will try to get a higher score
by feeding more data to libavformat, until the required score or the
max. probe size is reached.
Remove the lavf_preferred demuxer entry. This had a purpose in
mplayer-svn, but now there doesn't seem to be any good reason for it
to exist. Make sure that our native "good" demuxers are above
demux_lavf in demuxer_list[] instead (so that they are preferred).
[1] http://lr2mp0.latvijasradio.lv:8000
Diffstat (limited to 'DOCS')
-rw-r--r-- | DOCS/man/en/options.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/DOCS/man/en/options.rst b/DOCS/man/en/options.rst index 4f2acc5793..253bea472b 100644 --- a/DOCS/man/en/options.rst +++ b/DOCS/man/en/options.rst @@ -1028,6 +1028,12 @@ analyzeduration=<value> Maximum length in seconds to analyze the stream properties. + probescore=<1-100> + Minimum required libavformat probe score. Lower values will require + less data to be loaded (makes streams start faster), but makes file + format detection less reliable. Can be used to force auto-detected + libavformat demuxers, even if libavformat considers the detection not + reliable enough. (Default: 26.) format=<value> Force a specific libavformat demuxer. o=<key>=<value>[,<key>=<value>[,...]] |