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V4L2LOOPBACK-CTL(1) User Commands V4L2LOOPBACK-CTL(1)

NAME

v4l2loopback-ctl - control v4l2 loopback devices

DESCRIPTION

Usage:

utils/v4l2loopback-ctl [command] [args]

Commands:

set-fps <FPS> /dev/videoX
Set device fps (if format is already negotiated).
set-timeout-image <IMAGE> /dev/videoX
Set timeout on device, and optionally the placeholder picture, instead of default null frame.
set-caps <CAPS> /dev/videoX
Fix format for the device (using GStreamer caps), so it will be maintained until reset, regardless of future readers/writers.

OPTIONS

FPS
frames per second, either as integer ('30') or fraction ('50/2')
IMAGE
image file ("no-input.png"), or 'videotestsrc'
CAPS
GStreamer caps ("video/x-raw, format=UYVY, width=640, height=480"), or 'any'
/dev/videoX
the v4l2-loopback device file you want to act on

COPYRIGHT

Copyright © 2012 IOhannes m zmoelnig <zmoelnig@iem.at>
Copyright © 2012 Anton Novikov (random.plant@gmail.com)
February 2019 v4l2loopback-ctl 0.6