QV4L2(1)                           1.26.1""                           QV4L2(1)

NAME
       qv4l2 - A test bench application for video4linux devices

SYNOPSIS
       qv4l2 [-R] [-h] [-d <dev>] [-r <dev>] [-V <dev>] [-S <dev>]

DESCRIPTION
       The qv4l2 tool is used to test video4linux capture and output devices,
       either video, vbi, radio or swradio. This application can also serve as
       a generic video/TV viewer application or as a video generator for video
       output devices.

       However, it does not (yet) support compressed video streams other than
       MJPEG

OPTIONS
       -d, --device=<dev>
              Use device <dev> as the video device. If <dev> is a number, then
              /dev/video<dev> is used.

       -V, --vbi-device=<dev>
              Use device <dev> as the vbi device. If <dev> is a number, then
              /dev/vbi<dev> is used.

       -r, --radio-device=<dev>
              Use device <dev> as the radio device. If <dev> is a number, then
              /dev/radio<dev> is used.

       -S, --sdr-device=<dev>
              Use device <dev> as the SDR device. If <dev> is a number, then
              /dev/swradio<dev> is used.

       -R, --raw
              Open device in raw mode, i.e. without using the libv4l2 wrapper
              functions.

       -h, --help
              Prints the help message.

HOTKEYS
   Main Window
       Ctrl + O
              Open device

       Ctrl + R
              Open device in raw mode

       Ctrl + W
              Close the device

       Ctrl + V
              Start capture

       Ctrl + F
              Resize Capture Window to frame size

       Ctrl + Q
              Exit the application

   Capture Window
       Ctrl + W
              Closes the window and stops capture

       Ctrl + F
              Resize Capture Window to frame size

EXIT STATUS
       On success, it returns 0. Otherwise, it will return the error code.

BUGS
       Report bugs to Hans Verkuil <hverkuil@xs4all.nl>

v4l-utils                         March 2015                          QV4L2(1)