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93 lines
2.8 KiB
XML
93 lines
2.8 KiB
XML
<sect1 id="chapter-troubleshooting">
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<title id="title-troubleshooting">Troubleshooting GStreamer</title>
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<qandaset>
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<qandaentry>
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<question id="troubleshooting-segfault">
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<para>
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The GStreamer application I used stops with a segmentation fault. What can
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I do ?
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</para>
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</question>
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<answer>
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<para>
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There are two things you can do. If you compiled GStreamer with specific
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optimization compilation flags, you should try recompiling GStreamer,
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the application and the plug-ins without any optimization flags. This allows
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you to verify if the problem is due to optimization or due to bad code.
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Second, it will also allow you to provide a reasonable backtrace in case
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the segmentation fault still occurs.
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</para>
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<para>
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The second thing you can do is look at the backtrace to get an idea of where
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things are going wrong, or give us an idea of what is going wrong.
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To provide a backtrace, you should
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<orderedlist>
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<listitem>
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run the application in gdb by starting it with
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<programlisting>
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gdb (gst-application)
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</programlisting>
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(If the application is in a source tree instead of installed on the system,
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you might want to put "libtool" before "gdb")
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</listitem>
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<listitem>
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Pass on the command line arguments to the application by typing
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<programlisting>
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set args (the arguments to the application)
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</programlisting>
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at the (gdb) prompt
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</listitem>
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<listitem>
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Type "run" at the (gdb) prompt and wait for the application to
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segfault. The application will run a lot slower, however.
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</listitem>
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<listitem>
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After the segfault, type "bt" to get a backtrace. This is a stack of
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function calls detailing the path from main () to where the code is
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currently at.
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</listitem>
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<listitem>
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If the application you're trying to debug contains threads, it is also
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useful to do
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<programlisting>
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info threads
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</programlisting>
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and get backtraces of all of the threads involved, by switching to
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a different thread using "thread (number)" and then again requesting
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a backtrace using "bt".
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</listitem>
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<listitem>
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<para>
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If you can't or don't want to work out the problem yourself, a copy and paste
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of all this information should be included in your
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<link linkend="using-bugs-where">bug report</link>.
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</para>
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</listitem>
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</orderedlist>
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</para>
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</answer>
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</qandaentry>
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<qandaentry>
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<question id="troubleshooting-wiki">
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<para>
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I'm having problems building or installing GStreamer. What should I do ?
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</para>
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</question>
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<answer>
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<para>
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We've started a step-by-step
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<ulink url="http://gstreamer.net/wiki/?DichotomousKey">
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troubleshooting guide</ulink>.
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Look there before asking, your problem might already have been solved by
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someone else.
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</para>
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</answer>
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</qandaentry>
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</qandaset>
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</sect1>
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