Template:GSTREAMER TEST PATTERN
From Variscite Wiki
Test pattern allows you to display pre-built image/video patterns on the display. It is very useful when you don't have a camera but still want to test GStreamer.
Default test pattern:
# gst-launch-1.0 videotestsrc ! autovideosink
Test pattern with specific parameters on the input element:
# gst-launch-1.0 videotestsrc pattern=circular ! autovideosink
