"Hans Verkuil" <[EMAIL PROTECTED]> wrote:
> Actually, it would be quite nice if someone would make a C/C++ utility
> that would implement a simple snapshot application and save the resulting
> image in a normal image format like png. I wouldn't mind including that
> with the ivtv utilities.
I extended your(?) example hm12 decoder from README.hm12 to a program
I call hm12toyuv. Get it by http or bzr here:
http://highlab.com/~seb/hm12toyuv/
This program reads one frame from the IVTV HM12 interface (normally
/dev/video32), converts it to Abekas YUV format (4:2:2), and writes it
to a file.
The netpbm tools understand the Abekas YUV format, so from there you
can easily convert to many other formats, eg:
hm12toyuv --width 720 --height 480 - | yuvtoppm 720 480 | pnmtopng > frame.png
netpbm is part of most distributions and probably installed on most
machines that do video stuff, if not you can download the source here:
<http://netpbm.sourceforge.net/>
hm12toyuv does not read or write the configuration of the v4l2 device
at all, that needs to be done by v4l2-ctl before calling it.
--
Sebastian Kuzminsky The "portability to every insane system" disease
causes insanity on *all* platforms. -hpa
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