Man1 - qv4l2.1
Table of Contents
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>