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>