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QV4L2(1) User Commands 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

Use device <dev> as the video device. If <dev> is a number, then /dev/video<dev> is used.
Use device <dev> as the vbi device. If <dev> is a number, then /dev/vbi<dev> is used.
Use device <dev> as the radio device. If <dev> is a number, then /dev/radio<dev> is used.
Use device <dev> as the SDR device. If <dev> is a number, then /dev/swradio<dev> is used.
Open device in raw mode, i.e. without using the libv4l2 wrapper functions.
Prints the help message.

HOTKEYS

Main Window

Open device
Open device in raw mode
Close the device
Start capture
Resize Capture Window to frame size
Exit the application

Capture Window

Closes the window and stops capture
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>

March 2015 v4l-utils 1.24.1