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docs: update FAQ
Change versions. Use tools with version prefix.
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@ -24,41 +24,39 @@ git</link></para></listitem>
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<qandaentry>
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<question id="gstreamer-versions-explained">
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<para>There seem to be different GStreamer versions, like 0.8 and 0.10?
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<para>There seem to be different GStreamer versions, like 0.10 and 1.0?
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What's up with that?</para>
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</question>
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<answer>
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<para>
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GStreamer-0.8 and GStreamer-0.10 are the main version
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GStreamer-0.10 and GStreamer-1.0 are the main version
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'series' currently in use. For all practical purposes
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you should think of them as two completely different libraries
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which just happen to have a similar name. They can be installed
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in parallel and are completely independent.
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</para>
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<para>
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For the 0.8 version you will need the 0.8 plugins and bindings
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(gst-plugins 0.8.x, gst-ffmpeg 0.8.x, gst-python 0.8.x etc.), while
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for the 0.10 version you will need the 0.10 plugins and bindings
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(ie. gst-plugins-base 0.10.x, gst-plugins-good 0.10.x,
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gst-plugins-ugly 0.10.x, gst-plugins-bad 0.10.x, gst-ffmpeg 0.10.x,
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gst-python 0.10.x). The micro version for each main version does
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For the 0.10 version you will need the 0.10 plugins and bindings
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(gst-plugins 0.10.x, gst-ffmpeg 0.10.x, gst-python 0.10.x etc.), while
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for the 1.0 version you will need the 1.0 plugins and bindings
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(ie. gst-plugins-base 1.0.x, gst-plugins-good 1.0.x,
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gst-plugins-ugly 1.0.x, gst-plugins-bad 1.0.x, gst-ffmpeg 1.0.x,
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gst-python 1.0.x). The micro version for each main version does
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not have to match exactly, only the major versions needs to be the
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same (ie. it may be that the current gst-plugins-good version is
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0.10.6 and the current GStreamer core version is 0.10.13).
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GStreamer-0.10 will not see or use any of the GStreamer-0.8 plugins
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1.0.6 and the current GStreamer core version is 1.0.13).
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GStreamer-1.0 will not see or use any of the GStreamer-0.10 plugins
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and vice versa.
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</para>
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<para>
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All GStreamer command line tools are suffixed with their main
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version, e.g. gst-launch-0.8 and gst-launch-0.10, or gst-inspect-0.8
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and gst-inspect-0.10. The corresponding GStreamer command line
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tools without a suffix (e.g. gst-launch) will default to the highest
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major version.
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version, e.g. gst-launch-0.10 and gst-launch-1.0, or gst-inspect-0.10
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and gst-inspect-1.0.
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</para>
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<para>
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Applications will use either GStreamer-0.8 or GStreamer-0.10, since
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the 0.8 and 0.10 API/ABI are not compatible.
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Applications will use either GStreamer-0.10 or GStreamer-1.0, since
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the 0.10 and 1.0 API/ABI are not compatible.
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</para>
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<para>
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Odd-numbered versions such as 0.9.x, 0.11.x, etc. are unstable
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@ -74,10 +72,7 @@ git</link></para></listitem>
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<answer>
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<para>
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You should download GStreamer-0.10. GStreamer-0.8 is not developed
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any longer and has not been maintained for almost two years (you
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may still find it packaged for your disto though, but that's most
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likely for legacy applications).
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You should download GStreamer-1.0. GStreamer-0.10 is end-of-life.
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</para>
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</answer>
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</qandaentry>
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@ -13,7 +13,7 @@ Some application is telling me that I am missing a plug-in. What do I do ?
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<para>
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Well, start by checking if you really are missing the plug-in.
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<programlisting>
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gst-inspect (plug-in)
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gst-inspect-1.0 (plug-in)
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</programlisting>
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and replace (plug-in) with the plug-in you think is missing.
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If this doesn't return any result, then you either don't have it or your
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@ -156,12 +156,12 @@ On my system there is no gst-register command.
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<answer>
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<para>
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GStreamer version 0.10 does not need this anymore. The registry will
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Since GStreamer version 0.10 this is not needed anymore. The registry will
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be rebuilt automatically. If you suspect the registry is broken, just delete the
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<filename>registry.*.xml</filename> files under <filename>$HOME/.gstreamer-0.X/</filename>
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<filename>registry.*.xml</filename> files under <filename>$HOME/.gstreamer-1.X/</filename>
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and run
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<programlisting>
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gst-inspect
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gst-inspect-1.0
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</programlisting>
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to rebuild the registry.
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</para>
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@ -12,7 +12,7 @@
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First of all, verify that you have a working registry and that you can
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inspect them by typing
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<programlisting>
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$ gst-inspect fakesrc
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$ gst-inspect-1.0 fakesrc
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</programlisting>
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This should print out a bunch of information about this particular element.
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If this tells you that there is "no such element or plugin", you haven't
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@ -26,7 +26,7 @@ It's time to try out a few things. Start with gst-launch and two plug-ins
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that you really should have : fakesrc and fakesink. They do nothing except
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pass empty buffers. Type this at the command-line :
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<programlisting>
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$ gst-launch -v fakesrc num-buffers=3 ! fakesink
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$ gst-launch-1.0 -v fakesrc silent=0 num-buffers=3 ! fakesink silent=0
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</programlisting>
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This will print out output that looks similar to this :
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<programlisting>
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@ -56,24 +56,24 @@ You can test this by trying to play a sine tone. For this, you need to
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link the audiotestsrc element to an output element that matches your hardware.
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A (non-complete) list of output plug-ins for audio is
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<itemizedlist>
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<listitem><para>pulsesink for Pulseaudio output</para></listitem>
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<listitem><para>osssink for OSS output</para></listitem>
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<listitem><para>esdsink for ESound output</para></listitem>
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<listitem><para>artsdsink for aRTs output (not ported to 0.10 yet)</para></listitem>
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<listitem><para>alsasink for ALSA output</para></listitem>
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<listitem><para>alsaspdifsink for ALSA S/PDIF output</para></listitem>
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<listitem><para>jackaudiosink for JACK output</para></listitem>
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</itemizedlist>
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First of all, run gst-inspect on the output plug-in you want to use to
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make sure you have it installed. For example, if you use OSS, run
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First of all, run gst-inspect-1.0 on the output plug-in you want to use to
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make sure you have it installed. For example, if you use Pulseaudio, run
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<programlisting>
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$ gst-inspect osssink
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$ gst-inspect-1.0 pulsesink
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</programlisting>
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and see if that prints out a bunch of properties for the plug-in.
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</para>
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<para>
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Then try to play the sine tone by running
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<programlisting>
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$ gst-launch audiotestsrc ! audioconvert ! audioresample ! osssink
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$ gst-launch-1.0 audiotestsrc ! audioconvert ! audioresample ! pulsesink
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</programlisting>
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and see if you hear something. Make sure your volume is turned up,
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but also make sure it is not too loud and you are not wearing your headphones.
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@ -102,20 +102,16 @@ To do this you use the gst-inspect
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command-line tool, which comes standard with GStreamer.
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Invoked without any arguments,
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<programlisting>
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$ gst-inspect
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$ gst-inspect-1.0
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</programlisting>
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will print out a listing of installed plugins.
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To learn more about a particular plugin, pass its name on the command line.
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For example,
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<programlisting>
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$ gst-inspect volume
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$ gst-inspect-1.0 volume
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</programlisting>
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will give you information about the volume plugin.
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</para>
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<para>
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Also, if you install the gst-editor package, you will have a graphical
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plugin browser available, gst-inspect-gui.
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</para>
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</answer>
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</qandaentry>
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@ -168,27 +164,26 @@ provide us with the necessary gdb output. See
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<answer>
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<para>
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You access the GStreamer command line interface using the command gst-launch.
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To decode an mp3 and play it through OSS, you could use
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To decode an mp3 and play it through Pulseaudio, you could use
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<programlisting>
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gst-launch filesrc location=thesong.mp3 ! mad ! audioconvert !
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audioresample ! osssink
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gst-launch-1.0 filesrc location=thesong.mp3 ! mad ! pulsesink
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</programlisting>.
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More examples can be found in the gst-launch man page.
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</para>
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<para>
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To automatically detect the right codec in a pipeline, try
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<programlisting>
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gst-launch filesrc location=my-random-media-file.mpeg ! decodebin !
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audioconvert ! pulsesink
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gst-launch-1.0 filesrc location=my-random-media-file.mpeg ! decodebin !
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pulsesink
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</programlisting>.
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or
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<programlisting>
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gst-launch filesrc location=my-random-media-file.mpeg ! decodebin !
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gst-launch-1.0 filesrc location=my-random-media-file.mpeg ! decodebin !
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videoconvert ! xvimagesink
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</programlisting>
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Something more complicated:
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<programlisting>
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gst-launch filesrc location=my-random-media-file.mpeg ! decodebin name=decoder
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gst-launch-1.0 filesrc location=my-random-media-file.mpeg ! decodebin name=decoder
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decoder. ! videoconvert ! xvimagesink
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decoder. ! audioconvert ! pulsesink
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</programlisting>
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We also have a basic media playing plugin that will take care of most things
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for you. This plugin is called playbin. Try this:
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<programlisting>
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gst-launch playbin uri=file:///home/joe/my-random-media-file.mpeg
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gst-launch-1.0 playbin uri=file:///home/joe/my-random-media-file.mpeg
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</programlisting>
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This should play the file if the format is supported, ie. you have all the
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necessary demuxing and decoding and some output plugins installed.
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