mirror of https://github.com/mpv-player/mpv
Remove audio output section, it provides little to no useful information.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28207 b3059339-0415-0410-9bf9-f77b7e298cf2
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<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<chapter id="audio">
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<title>Audio output devices</title>
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<sect1 id="sync">
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<title>Audio/Video synchronization</title>
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<para>
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Linux sound card drivers have compatibility problems. This is because
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<application>MPlayer</application> relies on an in-built feature of
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<emphasis>properly</emphasis> coded sound drivers that enable them to
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maintain correct audio/video sync. Regrettably, some driver authors
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don't take the care to code this feature since it is not needed for
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playing MP3s or sound effects.
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</para>
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<para>
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Other media players like <ulink url="http://avifile.sf.net">aviplay</ulink>
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or <ulink url="http://xinehq.de">xine</ulink> possibly work
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out-of-the-box with these drivers because they use "simple" methods
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with internal timing. Measuring showed that their methods are not as
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efficient as <application>MPlayer</application>'s.
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</para>
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<para>
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Using <application>MPlayer</application> with a properly written audio
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driver will never result in A/V desynchronisation related to the audio, except
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only with very badly created files (check the man page for workarounds).
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</para>
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<para>
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If you happen to have a bad audio driver, try the <option>-autosync</option>
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option, it should sort out your problems. See the man page for detailed
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information.
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</para>
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</sect1>
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<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
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<sect1 id="troubleshooting">
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<title>Troubleshooting</title>
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<para>Some notes:</para>
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<para>
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If you have ALSA version 0.5, then you almost always have to use
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<option>-ao alsa5</option>, since ALSA 0.5 has buggy OSS emulation code,
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and will <emphasis role="bold">crash <application>MPlayer</application></emphasis>
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with a message like this:
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<screen>
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DEMUXER: Too many (945 in 8390980 bytes) video packets in the buffer!
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</screen>
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</para>
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<para>
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If the sound clicks when playing from CD-ROM, turn on IRQ unmasking as
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described in the <link linkend="drives">CD-ROM</link> section.
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</para>
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</sect1>
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</chapter>
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@ -169,8 +169,6 @@ can be distributed under the terms of the GNU General Public License Version 2.
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&tvinput.xml;
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&tvinput.xml;
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&radio.xml;
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&radio.xml;
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&video.xml;
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&video.xml;
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&audio.xml;
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&ports.xml;
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&ports.xml;
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&mencoder.xml;
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&mencoder.xml;
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&encoding-guide.xml;
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&encoding-guide.xml;
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@ -812,7 +812,6 @@ This can have multiple reasons.
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</para></listitem>
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</para></listitem>
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<listitem><para>
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<listitem><para>
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Your sound driver is buggy.
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Your sound driver is buggy.
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See the <link linkend="audio">audio section</link>.
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</para></listitem>
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</para></listitem>
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</itemizedlist>
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</itemizedlist>
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</para></answer>
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</para></answer>
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