mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-06 01:19:38 +00:00
90 lines
3.8 KiB
Text
90 lines
3.8 KiB
Text
=== The GstValidate CLI Tools
|
|
|
|
The commands here assume that you have installed gst-validate. If this
|
|
is not the case, go into the gst-validate directory and call the tools
|
|
directly with the path tools/<tool-executable>
|
|
|
|
1- gst-validate-1.0: It is the simplest tool and is used to run a gst
|
|
launch style pipeline. Monitors are added to it to identify issues in the
|
|
used elements. At the end a report will be printed, this report will
|
|
contain information about all issues that were encountered while running
|
|
gst-validate. To view issues as they are created, set the environment
|
|
variable GST_DEBUG=validate:2 and it will be printed as gstreamer
|
|
debugging. You can basically run any GstPipeline pipeline using it.
|
|
If you are not familiar with gst-launch syntax, please refer to
|
|
gst-launch's documentation.
|
|
|
|
Examples:
|
|
|
|
# Simple playback pipeline
|
|
gst-validate-1.0 playbin uri=file:///path/to/some/media/file
|
|
|
|
# Transcoding pipeline
|
|
gst-validate-1.0 filesrc location=/root/Videos/big_buck_bunny_1080p_h264.mov ! \
|
|
qtdemux name=d ! queue ! x264enc ! h264parse ! mpegtsmux name=m ! progressreport ! filesink location=/root/test.ts \
|
|
d. ! queue ! faac ! m.
|
|
|
|
You can also activate what we call "scenarios" which will execute
|
|
actions on the pipeline. Those actions can be for example, "set pipeline
|
|
to pause", "seek to N with rate=x" etc, using the following syntax:
|
|
|
|
gst-validate-1.0 playbin uri=file:///path/to/some/media/file --set-scenario=seek_forward
|
|
|
|
You can list all available scenarios using:
|
|
|
|
gst-validate-transcoding-1.0 --list-scenarios
|
|
|
|
Scenarios are simple text files describing a list of actions, you can find the
|
|
source scenario files in validate/data/
|
|
|
|
You can find more information about scenarios on the GstValidateScenario documentation: http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-validate/html/GstValidateScenario.html
|
|
|
|
You can find more information about the various action types available to be executed with:
|
|
|
|
gst-validate-1.0 -t <optional-action-type>
|
|
|
|
or:
|
|
|
|
gst-validate-transcoding-1.0 -t <optional-action-type>
|
|
|
|
2- gst-validate-transcoding-1.0: Transcodes input-uri to output-uri,
|
|
using the given encoding profile. The pipeline will be monitored for
|
|
possible issues detection using the gst-validate lib, at the end of
|
|
execution, a report containing information about all found issues will
|
|
be printed.
|
|
|
|
Example:
|
|
|
|
# Will transcode file://path/to/some/media/file to H264/AAC into mp4
|
|
gst-validate-transcoding-1.0 -o 'video/quicktime,variant=iso:video/x-h264:audio/mpeg,mpegversion=4' \
|
|
file://path/to/some/media/file file:///path/to/destination_h264_aac.qt
|
|
|
|
The same scenarios can be activated on gst-validate-transcoding-1.0 as
|
|
with gst-validate-1.0
|
|
|
|
3- gst-validate-media-check-1.0: Analyzes a media file and writes the
|
|
results to stdout or a file. It can also compare the results found with
|
|
another results file for identifying regressions. The monitoring lib
|
|
from gst-validate will be enabled during the tests to identify issues
|
|
with the GStreamer elements involved with the media file's container and
|
|
codec types. It will actually do a series of checks over the media file.
|
|
|
|
Example:
|
|
|
|
# Will check various media properties from the file
|
|
gst-validate-media-check-1.0 file://path/to/some/media/file
|
|
|
|
=== LD_PRELOAD / Testing with exiting application
|
|
|
|
If you want to test an already existing application without modifying it. Just
|
|
use:
|
|
|
|
LD_PRELOAD=path/to/libgstvalidatepreload.so yourapp ...
|
|
|
|
gst-validate will try to replace GstPipeline creating functions and configure
|
|
monitors automatically for you, reports will be printed to stderr when
|
|
they are found. You can also use GST_DEBUG to view the issues that were found
|
|
|
|
NOTES: The exit code will be "18" in case a critical issue has
|
|
been seen while running any of those tools.
|
|
|