I recently purchased a number of 8 in 1 DVD's (8 movies to 1 DVD)in Mymanar (Burma). The quality of these DVD's is very good on a 42" plasma. My question is what compression technique are they using? I can playback and copy these without any problems and they are recognised by all ROM's and DVD players. They are approx 8GB in size and I was able to compress them using Shrink. Can anyone enlighten me as to the compression technique liked to be used to achieve this Tks.