LinuxCommandLibrary

gst-xmllaunch-0.10

Launch GStreamer pipelines from XML descriptions

SYNOPSIS

gst-xmllaunch-0.10 [OPTION...] FILE.xml

PARAMETERS

--help, -h
    Shows a help message and exits.

--version
    Shows the version information and exits.

FILE.xml
    The path to the XML file containing the GStreamer pipeline definition.

DESCRIPTION

gst-xmllaunch-0.10 is a utility program provided with the GStreamer 0.10 multimedia framework. Its primary purpose is to parse and execute GStreamer pipelines defined in a structured XML file. This offers an alternative to constructing complex pipelines directly on the command line using gst-launch-0.10, promoting more readable and manageable pipeline definitions, especially for intricate setups involving multiple elements, properties, and interconnections. The XML schema typically describes GStreamer elements, their associated properties, and how they link together via pads. Upon execution, gst-xmllaunch-0.10 interprets this XML, builds the corresponding GStreamer pipeline graph, and runs it. While powerful for its time, this specific version targets the older GStreamer 0.10 series, which has largely been superseded by the 1.x series.

CAVEATS

  • Legacy Version: This command is specific to the GStreamer 0.10 series, which is now considered legacy and deprecated. Modern GStreamer development and applications primarily use the 1.x series.
  • XML Schema: The XML file must adhere to a specific GStreamer XML pipeline schema. Incorrect XML formatting or invalid element/property definitions will lead to errors.
  • Limited Debugging: Debugging issues within the XML structure itself can sometimes be less straightforward than with gst-launch's command-line approach, although GStreamer's standard debug flags can still be used.

XML PIPELINE STRUCTURE

An example XML pipeline for gst-xmllaunch-0.10 typically defines elements, their properties, and their connections, often looking like this:
<pipeline>
  <element name="source" factory="filesrc">
    <property name="location">video.mp4</property>
  </element>
  <element name="decoder" factory="decodebin2"/>
  <link src="source" sink="decoder"/>
</pipeline>
This demonstrates defining elements by their factory name, setting properties, and linking them together.

MIGRATION TO GSTREAMER 1.X

Users transitioning from GStreamer 0.10 to 1.x should be aware that gst-xmllaunch-0.10 has no direct 1.x equivalent. Pipelines previously defined in XML for 0.10 would need to be re-expressed using gst-launch-1.0 syntax or constructed programmatically within GStreamer 1.x applications.

HISTORY

gst-xmllaunch-0.10 was developed as part of the GStreamer 0.10 release cycle. It aimed to provide a more robust and organized method for defining complex multimedia pipelines, moving beyond the limitations of single-line command-line arguments. While innovative for its time, the 0.10 series was eventually succeeded by the GStreamer 1.x series in 2012. Consequently, gst-xmllaunch-0.10 and its associated XML pipeline concept are no longer actively maintained or used in new GStreamer 1.x based projects, which typically rely on direct gst-launch-1.0 commands or programmatic pipeline construction within applications.

SEE ALSO

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