mirror of https://github.com/mpv-player/mpv
138 lines
3.6 KiB
XML
138 lines
3.6 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<appendix id="bugs">
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<title>Known bugs</title>
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<sect1 id="bugs-special">
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<title>Special system/CPU-specific bugs/problems</title>
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<itemizedlist>
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<listitem>
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<para>General SIGILL (signal 4):</para>
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<para>
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Problem: you compiled and run <application>MPlayer</application> on
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different machines (for example compiled on P3 and running on Celeron)
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</para>
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<para>
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Solution: compile <application>MPlayer</application> on the same machine
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where you will use it!
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</para>
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<para>
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Workaround: You can forget all this by configuring with the
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<option>--enable-runtime-cpudetection</option> option or you can
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disable particular CPU instruction sets with more specific options (like
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<option>--disable-mmx</option>, <option>--disable-3dnow</option>, etc).
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</para>
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</listitem>
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<listitem>
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<para>Crashes when dumping streams:</para>
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<para>Problem: core dump</para>
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<para>Solution: Don't panic. Make sure you know where your towel is.</para>
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</listitem>
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</itemizedlist>
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</sect1>
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<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
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<sect1 id="bugs-audio">
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<title>Various A-V sync and other audio problems</title>
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<sect2 id="bugs-delay-all">
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<title>General audio delay or jerky sound
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(exists with all or many files)</title>
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<itemizedlist>
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<listitem><para>
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most common: buggy audio driver! - try to use different drivers, try ALSA OSS
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emulation with <option>-ao oss</option>, also try <option>-ao sdl</option>,
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sometimes it helps. If your file plays fine with <option>-nosound</option>,
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then you can be sure it's sound card (driver) problem.
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</para></listitem>
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<listitem>
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<para>audio buffer problems (buffer size badly detected)</para>
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<para>
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Workaround: <application>MPlayer</application>'s <option>-abs</option> option
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</para>
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</listitem>
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<listitem><para>
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samplerate problems - maybe your card doesn't support the samplerate used in
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your files - try the resampling filter (<option>-af resample=...</option>)
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</para></listitem>
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<listitem>
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<para>slow machine (CPU or VGA)</para>
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<para>
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try with <option>-vo null</option>, if it plays well, then you have slow
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VGA card/driver
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</para>
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<para>
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Workaround: buy a faster card or read this documentation about how to speed up
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</para>
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<para>Also try <option>-framedrop</option></para>
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</listitem>
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</itemizedlist>
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</sect2>
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<!-- ********** -->
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<sect2 id="bugs-delay-specific">
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<title>Audio delay/desync specific to one or a few files</title>
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<itemizedlist>
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<listitem>
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<para>bad file</para>
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<para>
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Workaround:
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<itemizedlist>
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<listitem>
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<para>
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<option>-ni</option> or <option>-nobps</option> option
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(for non-interleaved or bad files)
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</para>
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<para>and/or</para>
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</listitem>
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<listitem>
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<para>
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<option>-mc 0</option>
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(required for files with badly interleaved VBR audio)
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</para>
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<para>and/or</para>
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</listitem>
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<listitem>
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<para>
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<option>-delay</option> or <keycap>+</keycap>/<keycap>-</keycap>
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keys at runtime to adjust delay
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</para>
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</listitem>
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</itemizedlist>
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If none of these help, please upload the file, we'll check (and fix).
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</para>
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</listitem>
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<listitem>
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<para>your sound card doesn't support 48kHz playback</para>
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<para>
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Workaround: buy a better sound card... or try to decrease fps by 10%
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(use <option>-fps 27</option> for a 30fps movie) or use the resample filter
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</para>
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</listitem>
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<listitem>
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<para>
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slow machine (if A-V is not around 0,
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and the last number in the status line increasing)
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</para>
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<para>Workaround: <option>-framedrop</option></para>
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</listitem>
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</itemizedlist>
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</sect2>
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</sect1>
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</appendix>
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