Hi, I have a Linux 2.4 machine with a video capture card and a pan/tilt camera attached to it. I have installed the bttv module and it works. I would like to capture just one frame at a time in order to analyze the pixel values. I can communicate with the capture card and it does seem to give me back a table of pixel values. However, I am not sure if the values shown are correct. I would like to know the basic steps needed to capture an image. A link to a web page explaining the steps would be fine too. So far, here's what I am doing: 1. initialize the video_mmap structure 2. ioctl() on VIDIOCGMBUF to get the frame size. 3. use mmap() to map capture card memory to user process memory 4. capture a frame to the user process memory with ioctl on VIDIOCMCAPTUREC 5. ioctl on VIDIOCSYNC 6. print out the contents of frame as hex numbers. Am I doing this right? Is there any documentation explaining the basic steps to grabbing an image? Thanks. Ankur __________________________________________________ Do you Yahoo!? Y! Web Hosting - Let the expert host your web site http://webhosting.yahoo.com/
