> -----Alkuperäinen viesti----- > Lähettäjä: video4linux-list-admin@xxxxxxxxxx > [mailto:video4linux-list-admin@xxxxxxxxxx]Puolesta Michael Spall > Lähetetty: Wednesday, January 15, 2003 4:22 PM > Vastaanottaja: 'Video4linux (E-mail)' > Aihe: BTTV mmap problems (still) > > > I am still having problems with getting mmap to work in a system with a > BT848 card. > > The current system works fine on my development system with a USB Webcam > that only supports read(), but on my test system with a BT848 Capture card > that only supports mmap, I'm having problems. > > My main problem is that the mmap doesn't seem to be working, it prints out > the output line, but the screen remains black no matter what > combination of > resolutions and video sources I use. I've used XawTV to get an image from > the camera, so I know it works so I assume that the problem is in my code > somehwere, possibly with using the wrong buffers. > Have you tried to eliminate that SDL part and write to disk, for example? This would narrow the problem.. I think. Jonk
