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Failed to PAUSE stream error:

First check your permission on video0 device.
ls -la /dev/video0

It should appear something like this: crw-rw----+ 1 root video 81, 0 Sep 13 11:26 /dev/video0 where your login user must belong to video group users

You should also try to remove the comma of gscam config: export GSCAM_CONFIG="v4l2src device=/dev/video0 ! video/x-raw-rgb framerate=30/1 ! ffmpegcolorspace"

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