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GStreamer(1)									     GStreamer(1)

       gst-launch - build and run a GStreamer pipeline

       gst-launch [OPTION...] PIPELINE-DESCRIPTION

       gst-launch is a tool that builds and runs basic GStreamer pipelines.

       In  simple  form,  a  PIPELINE-DESCRIPTION  is a list of elements separated by exclamation
       marks (!).  Options may be appended to elements, in the form "option=value".  A	group  of
       elements surrounded by curly braces {, } will be executed in a separate thread.

       Connections between non-consecutive elements are created by specifying a element names and
       pad  names  immediately	before	and  after  the  exclamation  mark,  in  the  form  "ele-
       ment0.sinkpad!element1.srcpad".	 The  default name given to an element is the name of its
       class followed by an index.  If the element names are omitted, the previous and next  ele-
       ments  in  the PIPELINE-DESCRIPTION will be used.  If the pad names are omitted, a default
       pad of the correct type (source or sink) is found on the given  element,  typically  named
       "src" or "sink".

       See the GStreamer documentation for a complete description of a a PIPELINE-DESCRIPTION.

       The  examples  below  assume  that  you	have the correct plug-ins available.  In general,
       "osssink" can be  substituted  with  another  audio  output  plug-in  such  as  "esdsink",
       "alsasink", or "artsdsink".  Likewise, "xvideosink" can be substituted with "sdlvideosink"
       or "aasink".

       Audio playback

       Play the mp3 music file "music.mp3" using a libmad-based plug-in  and  output  to  an  OSS

	    gst-launch filesrc location=music.mp3 ! mad ! osssink

       Play an Ogg Vorbis format file:

	    gst-launch filesrc location=music.ogg ! vorbisfile ! osssink

       Play an mp3 file or stream retrieved via http:

	    gst-launch httpsrc location=http://domain.com/music.mp3 ! mad ! osssink

       Play an mp3 file or stream using GNOME-VFS:

	    gst-launch gnomevfssrc location=music.mp3 ! mad ! osssink

	    gst-launch gnomevfssrc location=http://domain.com/music.mp3 ! mad ! osssink

       Use GNOME-VFS to play an mp3 file located on an SMB server:

	    gst-launch gnomevfssrc location=smb://computer/music.mp3 ! mad ! osssink

       Format conversion

       Convert an mp3 music file to an Ogg Vorbis file:

	    gst-launch filesrc location=music.mp3 ! mad ! vorbisenc ! filesink location=music.ogg

       Alternatively, to convert to the FLAC format, use the command line:

	    gst-launch	 filesrc   location=claptrap.mp3   !  mad  !  flacenc  !  filesink  loca-


       Plays a .WAV file:

	    gst-launch filesrc location=music.wav ! wavparse ! osssink

       Convert a .WAV file into Ogg Vorbis (or mp3) file:

	    gst-launch filesrc	location=music.wav  !  wavparse  !  vorbisenc  !  filesink  loca-

	    gst-launch	filesrc  location=music.wav  !	wavparse  !  mpegaudio	!  filesink loca-

       Alternatively, if you have lame installed (and have the lame plug-in), you can  substitute
       lame for mpegaudio in the previous example.  It gives better results than mpegaudio.

       Rip all tracks from compact disc and convert them into a single mp3 file:

	    gst-launch cdparanoia ! mpegaudio ! filesink location=cd.mp3

       Using gst-inspect, it is possible to discover settings for cdparanoia that will tell it to
       rip individual tracks.

       Record sound from your audio input and encode it into an ogg file:

	    gst-launch osssrc ! vorbisenc ! filesink location=input.ogg


       Display only the video portion of an MPEG-1 video file, outputting to an X display  window
       (The "queue" element is necessary to buffer data between the threads):

	    gst-launch	filesrc location=JB_FF9_TheGravityOfLove.mpg ! mpegdemux video_%02d!src {
       queue ! mpeg2dec ! xvideosink }

       Display the video portion of a .vob file (used on DVDs), outputting to an SDL window:

	    gst-launch filesrc location=/flflfj.vob ! mpegdemux video_%02d!src { queue ! mpeg2dec
       ! sdlvideosink }

       Play both video and audio portions of an MPEG movie:

	    gst-launch filesrc location=movie.mpg ! mpegdemux video_%02d!src { queue ! mpeg2dec !
       sdlvideosink } mpegdemux0.audio_%02d!src { queue ! mad ! osssink }

       Play an AVI movie:

	    gst-launch filesrc location=movie.avi ! avidemux video_%02d!src { queue  !	windec	!
       sdlvideosink }

       Network streaming

       An  MPEG-1  system  stream  can	be  streamed via RTP from one machine to another.  On the
       receiver, execute:

	    gst-launch rtprecv media_type=mpeg1_sys ! mpegdemux video_%02d!src { queue ! mpeg2dec
       ! xvideosink } mpegdemux0.audio_%02d!src { queue ! mad ! osssink }

       On the transmitter, execute:

	    gst-launch filesrc location=mpeg1system.mpeg ! mpegparse ! rtpsend ip=IPorHostname


       Generate a null stream and ignore it:

	    gst-launch fakesrc ! fakesink

       Generate a pure tone to test the audio output:

	    gst-launch sinesrc ! osssink

       Generate a familiar test pattern to test the video output:

	    gst-launch videotestsrc ! xvideosink

       gst-launch accepts the following options:

       --help  Print help synopsis and available FLAGS

	       Do not output status information

       --exclude=TYPE, -XTYPE
	       Do not output status information of TYPE

       --output=FILE, -oFILE
	       Save XML representation of pipeline to FILE and exit

	       GStreamer info flags to set (list with --help)

	       GStreamer debugging flags to set (list with --help)

	       GStreamer info and debugging flags to set (list with --help)

	       GStreamer  info	flags  to  set	Enable printout of errors while loading GStreamer

	       Add directories separated with ':' to the plugin search path

       gst-complete(1), gst-register(1), gst-inspect(1)

       The GStreamer team at http://gstreamer.net/

					    March 2001				     GStreamer(1)
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