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ceaf8aaaa1
Add documentation for the environment variable, explaining what it is
used for and the default search locations.
Fixes: 4d569b51ed add a way to specify an application directory.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1829>
171 lines
6.7 KiB
Markdown
171 lines
6.7 KiB
Markdown
---
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title: Environment variables
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short-description: Environment variables influencing runtime behaviour
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...
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# GstValidate Environment Variables
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The runtime behaviour of GstValidate applications can be influenced by a
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number of environment variables.
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**GST_VALIDATE.**
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This environment variable can be set to a list of debug options, which
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cause GstValidate to print out different types of test result
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information and consider differently the level of the reported issues.
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* `fatal-criticals`: Causes GstValidate to consider only critical issues as import enough
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to consider the test failed (default behaviour)
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* `fatal-warnings`: Causes GstValidate to consider warning, and critical issues as
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import enough to consider the test failed
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* `fatal-issues`: Causes GstValidate to consider issue, warning, and critical issues
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as import enough to consider the test failed
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* `print-issues`: Causes GstValidate to print issue, warning and critical issues in
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the final reports (default behaviour)
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* `print-warnings`: Causes GstValidate to only print warning and critical issues in the
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final reports
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* `print-criticals`: Causes GstValidate to only print critical issues in the final
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reports
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**GST_VALIDATE_FILE.**
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Set this variable to a colon-separated list of paths to redirect all
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GstValidate messages to this file. If left unset, debug messages are
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output to standard error.
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You can use the special names `stdout` and `stderr` to use those output.
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**GST_VALIDATE_APPS_DIR.**
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Set this variable to a colon separated list of paths. The validate test
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runner will execute all `.py` scripts found within the directories.
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By default GstValidate will look for test applications in the folders:
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* subprojects/gst-examples/webrtc/check/validate/apps
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* subprojects/gst-editing-services/tests/validate
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**GST_VALIDATE_PLUGIN_PATH.**
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Set this variable to a colon-separated list of paths. GstValidate will
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scan these paths for GstPlugin files and add them to the GstRegistry.
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By default GstValidate will look for plugins in the user data directory
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specified in the [XDG standard]:
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`.local/share/gstreamer-GST_API_VERSION/plugins` and the
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system wide user data directory:
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`/usr/lib/gstreamer-GST_API_VERSION/validate`
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**GST_VALIDATE_SCENARIOS_PATH.**
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Set this variable to a colon-separated list of paths. GstValidate will
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scan these paths for GstValidate scenario files. By default GstValidate
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will look for scenarios in the user data directory as specified in the
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[XDG standard]:
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`.local/share/gstreamer-GST_API_VERSION/validate/scenarios` and the
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system wide user data directory:
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`/usr/lib/gstreamer-GST_API_VERSION/validate/scenarios`
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**GST_VALIDATE_CONFIG.**
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Set this variable to a colon-separated list of paths to GstValidate
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config files or directly as a string in the GstCaps serialization
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format. The config file has a format similar to the scenario file. The
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name of the configuration corresponds to the name of the plugin the
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configuration applies to.
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The special name "core" is used to configure GstValidate core
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functionalities (monitors, scenarios, etc...).
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If you want to make sure to set a property on a element of a type (for
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example to disable QoS on all sinks) you can do:
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```
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core, action=set-property, target-element-klass=Sink
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```
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If you want the GstPipeline to get dumped when an issue of a certain
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level (and higher) happens, you can do:
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```
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core, action=dot-pipeline, report-level=issue
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```
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Note that you will still need to set GST_DEBUG_DUMP_DOT_DIR.
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For more examples you can look at the ssim GstValidate plugin
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documentation to see how to configure that plugin.
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You can also check that a src pad is pushing buffers at a minimum
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frequency. For example to check if v4l2src is producing at least 60 frames
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per second you can do:
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``` yaml
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core,min-buffer-frequency=60,target-element-factory-name=v4l2src
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```
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This config accepts the following fields:
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- `min-buffer-frequency`: the expected minimum rate, in buffers per
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second, at which buffers are pushed on the pad
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- `target-element-{factory-name,name,klass}`: the factory-name, object
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name or class of the element to check
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- `name`: (optional) only check the frequency if the src pad has this
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name
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- `buffer-frequency-start`: (optional) if defined, validate will
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ignore the frequency of the pad during the time specified in this
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field, in ns. This can be useful when testing live pipelines where
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configuring and setting up elements can take some time slowing down
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the first buffers until the pipeline reaches its cruising speed.
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**GST_VALIDATE_OVERRIDE.**
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Set this variable to a colon-separated list of dynamically linkable
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files that GstValidate will scan looking for overrides. By default
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GstValidate will look for scenarios in the user data directory as
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specified in the [XDG standard]:
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`.local/share/gstreamer-GST_API_VERSION/validate/scenarios` and the
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system wide user data directory:
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`/usr/lib/gstreamer-GST_API_VERSION/validate/scenarios`
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**GST_VALIDATE_SCENARIO_WAIT_MULITPLIER.**
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A decimal number to set as a multiplier for the wait actions. For
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example if you set `GST_VALIDATE_SCENARIO_WAIT_MULITPLIER=0.5`, for a
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wait action that has a duration of 2.0 the waiting time will only be of
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1.0 second. If set to 0, wait action will be ignored.
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**GST_VALIDATE_REPORTING_DETAILS.**
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The reporting level can be set through the
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GST_VALIDATE_REPORTING_DETAILS environment variable, as a
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comma-separated list of (optional) object categories / names and levels.
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Omit the object category / name to set the global level.
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Examples:
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```
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GST_VALIDATE_REPORTING_DETAILS=synthetic,h264parse:all
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GST_VALIDATE_REPORTING_DETAILS=none,h264parse::sink_0:synthetic
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```
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Levels being:
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* `none`: No debugging level specified or desired. Used to deactivate
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debugging output.
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* `synthetic`: Summary of the issues found, with no details.
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* `subchain`: If set as the default level, similar issues can be reported multiple
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times for different subchains. If set as the level for a particular
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object (`my_object:subchain`), validate will report the issues where
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the object is the first to report an issue for a subchain.
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* `monitor`: If set as the default level, all the distinct issues for all the
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monitors will be reported. If set as the level for a particular
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object, all the distinct issues for this object will be reported.
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Note that if the same issue happens twice on the same object, up
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until this level that issue is only reported once.
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* `all`: All the issues will be reported, even those that repeat themselves
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inside the same object. This can be **very** verbose if set
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globally.
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Setting the reporting level allows to control the way issues are
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reported when calling [gst_validate_runner_printf()](gst_validate_runner_printf).
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[XDG standard]: http://www.freedesktop.org/wiki/Software/xdg-user-dirs/
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