In lists.linux.v4l, you wrote: > On Wednesday 07 February 2001 10:50 pm, Gerd Knorr wrote: > > > Exactly. For capture you could do XvPutImage to blit to a pixmap, > > then XGetImage (note the missing "v" here) to transfer the image data > > from the pixmap (X-Server´s storage) into your X11 client memory. > > Can you? > > My understanding is that where an overlay is used you'll get a nice virulent purple or bright > blue image, not the video. It can be both overlay (with the bt848 writing yuv to offscreen memory, the gfx card setting up an overlay and filling the window with the chromakey color) and direct transfer of rgb data to the visible area of the framebuffer. For capture you'd use the RGB variant of course. > I guess if your Xv is blitting directly into video memory that would > work but why use Xv if you're happy with an unscaled fast blit xawtv > -noxv makes more sense. Xv has some adwantages like that the annonying refresh is gone (even when writing rgb directly to the screen). For video recording xawtv -noxv is more useful than implementing capture in Xv of course. Gerd -- Get back there in front of the computer NOW. Christmas can wait. -- Linus "the Grinch" Torvalds, 24 Dec 2000 on linux-kernel
