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qv4l2 - Online in the Cloud

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This is the command qv4l2 that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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.

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