Dvd Incompatibility One Computer To The Other

Ok this is weird one. My mate has an AMD system I have a Intel P4 Hyperthread. He has Clone DVD and anydvd 2.0.4.0 I did 4 movies for him they all play fine in my computer and in his as well. But when he goes to play in his dvd player the sound and the picture is totally out off wack its noisy sound and bad video. Get this he burns it back using his system and clonedvd and anydvd and then it plays in his dvd player perfect. We have tried Vertex 2x dvds Shintaro 4x Dvd and Datawrite 2x as well. I never have any problems at all with any of them all perfect burns never a coaster. He has Pioneer Burner a106 I have Teac DVW-50E. So does any one know why this occurs thats a weird problem. I would say its his home dvd player its one of those unknown brands cheapo but for the fact that he reburns and they work perfect from the dvd I gave him in the forst place puzzels him and I both. STRANGE !!! ANY IDEAS
I hope I have explained this correctly…