Thank you Erkan, I saw some of this headers but I was trying to use some simple, I am able to use the microsoft API for videos (vfw32, or video for windows), but this API seams to not work fine, or I am using wrongly because it always make the interleaving of all streams, and seams to discard the delay structure of the stream. If you know something of this kind or line I will be real greatfull, otherwise, Thanks. Allan