qv4l2 - A test bench application for video4linux devices

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

v4l-utils 1.28.1                                   March 2015                                           QV4L2(1)

       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

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

MainWindowCtrl+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

   CaptureWindowCtrl+W
              Closes the window and stops capture

       Ctrl+F
              Resize Capture Window to frame size

       qv4l2 - A test bench application for video4linux devices

-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.

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