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usptact/gst-tee.txt

Last active March 14, 2025 04:12
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GStreamer: read a stream from video camera and use tee to (a) show the stream on display and (b) write to a file
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gst-tee.txt
$ gst-launch-1.0 -e v4l2src device=/dev/video0 do-timestamp=true ! 'video/x-raw, width=640, height=480, framerate=30/1' ! tee name=t \
t. ! queue ! videoconvert ! autovideosink \
t. ! queue leaky=downstream ! videoconvert ! x264enc tune=zerolatency speed-preset=ultrafast key-int-max=30 byte-stream=true ! splitmuxsink muxer=mp4mux location=output.mp4
Notes:
x264enc appears to be not playing nice with streams. Removing its options blocks the pipeline. Replacing it with vaapih264enc works but then splitmuxsink has to be replaced with filesink for some reason...
vaapih264enc enables hardware acceleration on systems with Intel hardware. The plugin is available if you install an extra package: sudo apt install gstreamer1.0-vaapi
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