vidcat(1)
capture a frame from a video4linux device
SYNOPSIS
vidcat [-h?blgV] [-d <device>] [-f jpeg|ppm|png] [-i tv|comp1|com1|s-video] [-n pal|ntsc|secam] [-q <1..100>] [-s WIDTHxHEIGHT] [-o <file>]
DESCRIPTION
vidcat
captures a frame from a video4linux device and writes
the result to the standard output device. With the following
options you can define output format, size etc..
OPTIONS
- -d device
-
Use an alternate v4l device, '/dev/video' is the default device.
- -b
-
This applies only to PPM output. With this option the PPM
ouput is written in binary mode.
- -f ppm|jpeg|png|yuv4mpeg
-
Define the file format to use for the output stream. The
default is "jpeg".
- -g
-
Use greyscale instead of RGB24 for the output data.
- -i tv|comp1|comp2|s-video
-
Set the input channel to use. The default value is none,
which means the preset of the device is used.
- -l
-
Loops until CTRL+C is pressed. This is the default for
the YUV4MPEG output.
- -n pal|ntsc|secam
-
Select the input norm for the grabbing device. The
default value is none.
- -o file
-
Use the named file for output instead of standard out.
- -p c|g|y|Y
-
Set the palette to use: c = RGB24, g=GREY, y=YUV420P, Y=YUV422P.
- -q 1..100
-
Set the quality for JPEG output. The value could
be a number between 1 and 100. The default value is 80.
- -s WIDTHxHEIGHT
-
Define the size of the output frame in pixels. The default
setting is 320x240.
- -V
-
Show version number and exit.
