Hi Frank, Frank Hrebabetzky wrote: > I want to transfer image frames (640x480x8 gray values) from the video > device to a gtk pixmap. I understood the data stucture underlying > pixmap, but I never accessed a device.
On linux, you should use the video4linux system. This is a standard(ish) API which you can use to talk to most linux video devices. http://www.exploits.org/v4l/ For source examples, I'd suggest looking at the insides of some of the linux webcam programs, they're all really simple and do almost exactly what you want. Here's a thing I did for single-frame linux video grabs. It probably ought to be redone for v4l2: http://cima.ng-london.org.uk/~john/im_video_v4l1.c http://cima.ng-london.org.uk/~john/im_video_v4l1.h Use it something like this: grab_frame( IMAGE *im, const char *device, int channel, int brightness, int colour, int contrast, int hue, int ngrabs ) { LGrab *lg; if( !(lg = lgrab_new( device )) ) return( -1 ); if( lgrab_set_capture_size( lg, lg->capability.maxwidth, lg->capability.maxheight ) || lgrab_set_channel( lg, channel ) || lgrab_set_brightness( lg, brightness ) || lgrab_set_colour( lg, colour ) || lgrab_set_contrast( lg, contrast ) || lgrab_set_hue( lg, hue ) || lgrab_set_ngrabs( lg, ngrabs ) || lgrab_capture( lg, im ) ) { lgrab_destroy( lg ); return( -1 ); } lgrab_destroy( lg ); return( 0 ); } John ========================================================== Current Exhibition: T I T I A N Until 18 May 2003 Advance Booking Recommended Open every day Wed-Sat late opening until 9pm For information and tickets: http://www.nationalgallery.org.uk/exhibitions/titian _______________________________________________ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
