1QV4L2(1)                         User Commands                        QV4L2(1)
2
3
4

NAME

6       qv4l2 - A test bench application for video4linux devices
7

SYNOPSIS

9       qv4l2 [-R] [-h] [-d <dev>] [-r <dev>] [-V <dev>] [-S <dev>]
10

DESCRIPTION

12       The  qv4l2 tool is used to test video4linux capture and output devices,
13       either video, vbi, radio or swradio. This application can also serve as
14       a generic video/TV viewer application or as a video generator for video
15       output devices.
16
17       However, it does not (yet) support compressed video streams other  than
18       MJPEG
19

OPTIONS

21       -d, --device=<dev>
22              Use device <dev> as the video device. If <dev> is a number, then
23              /dev/video<dev> is used.
24
25       -V, --vbi-device=<dev>
26              Use device <dev> as the vbi device. If <dev> is a  number,  then
27              /dev/vbi<dev> is used.
28
29       -r, --radio-device=<dev>
30              Use device <dev> as the radio device. If <dev> is a number, then
31              /dev/radio<dev> is used.
32
33       -S, --sdr-device=<dev>
34              Use device <dev> as the SDR device. If <dev> is a  number,  then
35              /dev/swradio<dev> is used.
36
37       -R, --raw
38              Open  device in raw mode, i.e. without using the libv4l2 wrapper
39              functions.
40
41       -h, --help
42              Prints the help message.
43

HOTKEYS

45   Main Window
46       Ctrl + O
47              Open device
48
49       Ctrl + R
50              Open device in raw mode
51
52       Ctrl + W
53              Close the device
54
55       Ctrl + V
56              Start capture
57
58       Ctrl + F
59              Resize Capture Window to frame size
60
61       Ctrl + Q
62              Exit the application
63
64   Capture Window
65       Ctrl + W
66              Closes the window and stops capture
67
68       Ctrl + F
69              Resize Capture Window to frame size
70

EXIT STATUS

72       On success, it returns 0. Otherwise, it will return the error code.
73

BUGS

75       Report bugs to Hans Verkuil <hverkuil@xs4all.nl>
76
77
78
79v4l-utils 1.20.0                  March 2015                          QV4L2(1)