|GStreamer 0.10 Core Reference Manual|
Running GStreamer Applications
Running GStreamer Applications — How to run and debug your GStreamer application
GStreamer inspects a few of environment variables in addition to standard
plug-ins in the user's home directory. These are stored in a directory called
plugins inside the
.gstreamer-0.10 directory in the user's
plug-ins installed system-wide. On this system, they are stored in
GStreamer will scan these paths for GStreamer plug-ins. These plug-ins will be loaded after the plug-ins in the GST_PLUGIN_PATH variable below. The paths are scanned in the given order. This allows a user to override system-installed plug-ins with his own versions. Setting this variable to an empty string will cause GStreamer not to scan any system paths at all for plug-ins. This can be useful if you're running uninstalled (for development purposes) or while running testsuites.
This environment variable can be set to a colon-separated list of paths.
GStreamer will scan these paths for GStreamer plug-ins. These plug-ins will
be loaded in addition to, and before, the plug-ins in the system paths.
If GStreamer has been configured with
this variable can be set to a list of debug options, which cause GStreamer
to print out different types of debugging information to stderr.
The variable takes a comma-separated list of "category_name:level" pairs
to set specific levels for the individual categories.
The level value ranges from 0 (nothing) to 5 (LOG).
Logs all fatal errors. These are errors that do not allow the core or elements to perform the requested action. The application can still recover if programmed to handle the conditions that triggered the error.
Logs all warnings. Typically these are non-fatal, but user-visible problems are expected to happen.
Logs all informational messages. These are typically used for events in the system that only happen once, or are important and rare enough to be logged at this level.
Logs all debug messages. These are general debug messages for events that happen only a limited number of times during an object's lifetime; these include setup, teardown, change of parameters, ...
Logs all log messages. These are messages for events that happen repeatedly during an object's lifetime; these include streaming and steady-state conditions.
The category_name can contain "
*" as a wildcard.
For example, setting
GST_AUTOPLUG:5,GST_ELEMENT_*:3, will cause the
GST_AUTOPLUG category to be logged at full
LOG level, while all categories starting with
GST_ELEMENT_ will be logged at
To get all possible debug output, set
Set this environment variable to any value ("1" typically) to switch off
colouring in GST_DEBUG output. This has the same effect as specifying the
--gst-debug-no-color command line option to well-behaved
GStreamer applications (ie. those that pass command-line options correctly to
This is particularly useful to reduce the size of debug output and also allows
for the output to be compressed much better than with colours turned on.
Set this environment variable to "no" to prevent GStreamer from forking on
startup in order to update the plugin registry. This is useful for debugging
purposes, but should not be used under normal circumstances, since it means
that plugins may be loaded into memory even if they are not needed by the
Set this environment variable to "no" to prevent GStreamer from updating the
plugin registry. This is useful for embedded device which is not updating the
plugins frequently, it will save time when doing gst_init().