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>