> I'm sure I'm missing something, I'm not very experienced with unix > programming. Could some kind soul let me in on the voodoo knowledge I'm > missing here? Its a ring buffer. When you start capturing the kernel starts filling all the available buffers one per frame. As you finish with each frame in the shared buffer you tell the kernel via the ioctl and it becomes eligible for reuse. The driver runs round and round the ring chasing after you. If the driver catches up with you in the ring it will start dropping frames Alan
