Hi All Using tsmuxer to convert mkv files and then imgburn to burn, following exactly the instructions on here, sometimes when I make a blu-ray it works perfect and another one pixellates all over the place. Am I doing something wrong? I have heard that maybe the write speed should be lower, as when i burn just now it writes at about 2.0 I keep ruining blu-ray discs as they are so expensive I'd almost be better going out and buying the movie (I said almost) Any help is much appreciated, and please bear with me if I have not posted enough info here. I'm a newbie and learning the info requirements one stage at a time. Cheers Dingo