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gstreamer-cheat-sheet/test_streams.md
Matthew Clark c557004c9d Capturing images
2018-02-20 13:12:12 +00:00

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Test streams (GStreamer command-line cheat sheet)

### Display a test pattern

gst-launch-1.0 videotestsrc ! videoconvert ! autovideosink

This should display the test pattern in a window, that looks a bit like this:

Test pattern window

There are multiple test patterns available, such as

| videotestsrc pattern=snow | !(images/test_snow.png) | | videotestsrc pattern=red (and blue and green) | !(images/test_red.png) | | videotestsrc pattern=red (and blue and green) | !(images/test_red.png) | | videotestsrc pattern=pinwheel | !(images/test_pinwheel.png) | | videotestsrc pattern=smpte100 (color test bars) | !(images/test_smpte100.png) | | videotestsrc pattern=colors | !(images/test_colors.png) |

For the full list of patterns, see https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-videotestsrc.html

### Listen to a test audio (beep)

gst-launch-1.0 audiotestsrc ! audioconvert ! autoaudiosink

Combine both the test pattern and test audio:

gst-launch-1.0 audiotestsrc ! autoaudiosink videotestsrc ! autovideosink