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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-yuv, 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)