v4l2loopback-ctl (1)

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.

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-yuv, width=640, height=480"), or 'any'

\,/dev/videoX\/

the v4l2-loopback device file you want to act on

Copyright © 2012 IOhannes m zmoelnig <[email protected]>

Copyright © 2012 Anton Novikov ([email protected])