I must also apologise for the fact that I have made it so, quite possibly unnecessarily, targeted at transport streams. I work with a lot of transport streams,

I must also apologise for the fact that I have made it so, quite possibly unnecessarily, targeted at transport streams. I work with a lot of transport streams, but am quite ignorant of other formats - I had assumed that transport streams were relatively unique in having multiple video/audio channels... but I could imagine I'm very wrong.