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authorwm4 <wm4@nowhere>2012-12-08 20:14:13 +0100
committerwm4 <wm4@nowhere>2012-12-11 00:37:54 +0100
commit222a5cf7c0a4de094f368f7154122a72312dbf39 (patch)
treef8189ba3a04192a1ecbf066baa900daecb763787 /DOCS/man/en/options.rst
parent323eb54b60db4780ca7a9a6de375882eca24becd (diff)
downloadmpv-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/man/en/options.rst')
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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>[,...]]