I have had RatDVD on my pc for a while now but have never got round to using it. Having to need some hard drive space, and out of dvd's atm. I thought why not look at RatDVD.
So i encoded the same movie both on same pc (not same time). I've done this 6 times as folows.
A dvdlab made one song video dvd.
Results for constant qulity vs constant average bitrate in RatDVD. Testing was done in both modes using the slider setting at highest (far right).
For every test i ran a whole files (main movie and song video) through a bit rate tester. So that i could see both bitrate and picture quality along the whole vob video duration. Also compare two at one on the screen at once, always against original source dvd (same vob).
The difference was easy to see, all RatDVD (decompressed) back to a normal dvd structure. These vobs are all down for bitrate and picture quality. The best mode for keeping bitrate and picture quality of video is constant average bitrate. All had better rates than constant quality.
Why then does the author of RatDVD say on both the sites (.de and .ca) that constant quality is the best. Could the default settings for the encode engine be wrongly set ?
The codec settings location = click DVD>RatDVD : Codec
No way getting a 1:1 dvd back, we all know that. As convert lossy>lossy=more lossy. But i will say this with constant average bitrate it's not bad at all, better than xvid'ing or x264'ing or other and still reatin what chosen. Very happy to see the gop stucture is good for RatDVD>DVD.
Encode takes forever on a dual core, not to much faster even on a friends quad core. Then maybe there exists a more optimised xeb encoder, links please..
The let down is, it takes years to decompress a RatDVD > DVD. It's only a Zip compressed (PK) archive. Took hours for a dvd5 on all pc's i have tried on, far worse for dvd9. Has anyone found a way to decompress them back to dvd structure ifo, bup, vob, etc, faster than RatDVD can ?