QV4L2(1) User Commands QV4L2(1) (NAME) qv4l2 - video4linux (SYNOPSIS) qv4l2 [-R] [-h] [-d ] [-r ] [-V ] [-S ] (DESCRIPTION) qv4l2 video4linux vbi swradio . / . () MJPEG . (OPTIONS) -d, --device= . /dev/video . -V, --vbi-device= vbi. /dev/vbi . -r, --radio-device= . /dev/radio . -S, --sdr-device= SDR. /dev/swradio . -R, --raw (raw) libv4l2. -h, --help . (HOTKEYS) (Main Window) Ctrl + O Ctrl + R (raw) Ctrl + W Ctrl + V (capture) Ctrl + F Ctrl + Q (Capture Window) Ctrl + W Ctrl + F (EXIT STATUS) 0 . . (BUGS) Hans Verkuil v4l-utils 1.32.0 March 2015 QV4L2(1)