> i am a newbe in using the V4L-API and found no documentation in the net, > except the API-DOC. Welcome to the marvellous world of V4L. The API documentation is badly lacking at the moment and you might encounter some difficulty extracting hints on how to begin from some members of the community. I've taken the decision to move the V4L2 - an altogether more rounded API with significantly more documentation. If you want to persist with V4L I'd me more than happy to mail you some of the test programs I knocked together while learning. All the best and good luck, Simon Turvey Faculty of Engineering and Information Sciences University of Hertfordshire UK