v4l2loopback-ctl - Man Page

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

Info

February 2021 v4l2loopback-ctl 0.6