Hello, My name is Ongun. I am doing my junior design project right now. My project is Motion detection in a recorded video file. I am planning to do this by Matlab. I was looking for help and hints with google, I found your work. If you give me some advice and hits. I would be really happy. Currently, I am trying to figure out to export a video file to use for matlab command movie( ). But, I cannot find the specific requirements for that.(Mac osx) movie only accepts 8-bit image frames. Thank you for your help I also posted the same message to your motion sensor topic. my email is ongun@mac.com