.TH "QV4L2" "1" "March 2015" "v4l-utils "1.26.1"" "User Commands"
.SH NAME
qv4l2 - A test bench application for video4linux devices
.SH SYNOPSIS
.B qv4l2
[\fI-R\fR] [\fI-h\fR] [\fI-d <dev>\fR] [\fI-r <dev>\fR] [\fI-V <dev>\fR] [\fI-S <dev>\fR]
.SH 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.
.PP
However, it does not (yet) support compressed video streams other than MJPEG
.SH OPTIONS
.TP
\fB\-d\fR, \fB\-\-device\fR=\fI<dev>\fR
Use device <dev> as the video device. If <dev> is a number, then /dev/video<dev> is used.
.TP
\fB\-V\fR, \fB\-\-vbi-device\fR=\fI<dev>\fR
Use device <dev> as the vbi device. If <dev> is a number, then /dev/vbi<dev> is used.
.TP
\fB\-r\fR, \fB\-\-radio-device\fR=\fI<dev>\fR
Use device <dev> as the radio device. If <dev> is a number, then /dev/radio<dev> is used.
.TP
\fB\-S\fR, \fB\-\-sdr-device\fR=\fI<dev>\fR
Use device <dev> as the SDR device. If <dev> is a number, then /dev/swradio<dev> is used.
.TP
\fB\-R\fR, \fB\-\-raw\fR
Open device in raw mode, i.e. without using the libv4l2 wrapper functions.
.TP
\fB\-h\fR, \fB\-\-help\fR
Prints the help message.
.SH HOTKEYS
.SS Main Window
.TP
\fICtrl + O\fR
Open device
.TP
\fICtrl + R\fR
Open device in raw mode
.TP
\fICtrl + W\fR
Close the device
.TP
\fICtrl + V\fR
Start capture
.TP
\fICtrl + F\fR
Resize Capture Window to frame size
.TP
\fICtrl + Q\fR
Exit the application
.SS Capture Window
.TP
\fICtrl + W\fR
Closes the window and stops capture
.TP
\fICtrl + F\fR
Resize Capture Window to frame size
.SH EXIT STATUS
On success, it returns 0. Otherwise, it will return the error code.
.SH BUGS
Report bugs to Hans Verkuil <hverkuil@xs4all.nl>