martinibuster - 11:22 am on Sep 24, 2013 (gmt 0)
You're right Bob. I just checked the specs on a $44 Sony DVD player and the only alt video spec it played was mpeg 1. A $33 DVD player from LG plays mpeg 1 and a few others. A $32 Samsung played mpeg 2 & 4 but not mpeg 1.
So perhaps it might be safe to say that the formats played on DVD players aren't uniform, as you suggested. The only alternative would be to create a data disc with multiple formats but you know some fart is going to insert the disc and not know what to do next and call it a fail.