About xawtv
A message that is not in the archive (sent off-list or not yet received): [email protected]
Hi michael i am getting this error when i run that command which you gave to me..
sharief@sharief-desktop:~/Desktop/video drivers$ gcc vgrab5.c -Wall -o vgrab5 sharief@sharief-desktop:~/Desktop/video drivers$ ./vgrab5 /dev/video0 > t.pgm ioctl (VIDIOC_S_FMT) failed, 22VIDIOC_S_FMT: Invalid argument
what is the error?what to do?
--- On Fri, 9/1/09, Michael Williamson <[email protected]> wrote:
From: Michael Williamson <[email protected]>
Subject: Re: About xawtv
To: [email protected]
Date: Friday, 9 January, 2009, 10:14 PM
Quoted 11 lines · niamathullah sharief
From: niamathullah sharief <[email protected]>
Subject: Re: About xawtv
To: "Michael Williamson" <[email protected]>
Cc: "video4linux list" <[email protected]>
Date: Thursday, January 8, 2009, 9:06 PM
Thanks for your valuable reply...first program is ok...buty what this secand program?and you told thatattached another program, "rover.c", that displays pictures using the
SDL library, which must be installed before compiling.
Quoted 2 lines
what to install before compilation?whether firat program or anything else?
Hi,
The first program, "vgrab5.c", should compile with the command line
# gcc vgrab5.c -Wall -o vgrab5
Does it? Then, running the program should grab a picture from a video device, "/dev/video0" for example,
# ./vgrab5 /dev/video0 > t.pgm
and save the picture as a ".pgm" file. You need a display program, like ImageMagicks program "display" to display the picture
# display t.pgm
or
# gimp t.pgm
But it is black & white only.
The other program, "rover.c", is for operating a robot. I sent it to you because it has example code for using the SDL library to display the pictures. You can try to compile it, with
# gcc rover.c -Wall -lSDL -lm -o rover
Does it compile without errors? But even if it does compile, it is unlikely to be useful to you as it is.
-Mike
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