08-28-2005, 12:56 PM
Ever wonder why even on the best mastered perfect collection show hints of pixelation? Well I think I have figured it out. A dvd-5 contains 4.7 GB of data, a dvd-9 contains 8.5 as we all know. It is a fact that on many perfect collections (im not saying all) official dvd's are done a 2 on 1 or a 2 on 3 ratio often the sources are single volume dvd-5's.
4.7 GB + 4.7 GB = 9.4 GB
Dvd-9 = 8.5 GB
data loss for 2 full dvd-5 on one dvd-9 = 900mb
It is a fact that the second layer of a dual layer disc cannot hold as much as the first, so putting 2-3 full dvd-5's on a dvd-9 requires a 10-25% compression. True this can be slightly reduced by cutting features, but this can only do so much.
The saying Dvd-9 can hold twice as much as a Dvd-5 is not at all true.
4.7 GB + 4.7 GB = 9.4 GB
Dvd-9 = 8.5 GB
data loss for 2 full dvd-5 on one dvd-9 = 900mb
It is a fact that the second layer of a dual layer disc cannot hold as much as the first, so putting 2-3 full dvd-5's on a dvd-9 requires a 10-25% compression. True this can be slightly reduced by cutting features, but this can only do so much.
The saying Dvd-9 can hold twice as much as a Dvd-5 is not at all true.
aka EngrishMajor