qv4l2 - A test bench application for video4linux devices

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  HOTKEYS  Main Window  Capture Window  EXIT STATUS  BUGS 

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 <[email protected]>


Updated 2024-01-29 - jenkler.se | uex.se