Why perfect collections arent perfect - my analysis

[gubi-gubi]

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.

Well the argument doesn't matter seeing as more often than not HKs have like 3 volumes on one dvd-9 and not 2. 9 episodes usually and alot of r1s have 3 eps a disc and stuff. Saying they are not perfect because of this is pointless seeing as they would only be perfect if they were direct rips without any reencoding. Like Schultz said they only loose quality when reencoded. You could reencode to a higher bitrate than the source and the copy would still look worse than the original.