XviD from 500 to 4000 kbps

Obviously, the greater the bitrate, the better the picture. But when you are going to backup these DVDs, which bitrate are you going to use? That's the very question I asked myself. And here are my results.
The first pass took 2 hours and 50 minutes. The second pass took a little more than 4 hours on my Sempron 2500+, for all the bitrates. Encodes: 500, 750, 1000, 1500, 2000, 3000 and 4000 kbps
I chose Nemo because it's time for me to back it up ;). This is a good test I wanted to do because there is one thing all MPEG encoders fear: encoding smooth gradation, like most scenes underwater. I noticed that when I encoded U-571. I had to raise the bitrate so much it was almost ridiculous to make it a DivX... Let's see if XviD has the same problem.
Encodes were done using native resolution: 720x480. I used DVD2AVI, vfapi_reader, and VDubMod to get the encoding done. Not the best (quality and time-wise) but that's what I used...

There is a forum over here to allow you any feedback, bug report, feature request or anything else you see fit.

Well, let's get to the point. The comparison is made on 8 different frames of the anime:
19617This frame is all quiet: Apart from the movement of the water, slow and repetitive, nothing moves.
20237Here we can see the surface. Apart from the camera, Nemo is the only object in motion.
22016Lots of motion as Nemo's father is thrown away by the boat's engine. Lots of bubbles moving around.
36120Here again, nothing moves apart from waves. It is taken outside and the scene is very dark.
50815Nemo's father is facing a fish and there is quite a bit of motion. The scene goes from dark to clear.
119047Here Dory is moving a bit, but apart from that the scene is pretty calm.
126847The last scene, with very high motion and details.
The images that you are going to see in the next step are JPEG images. I have compressed them using the MAX QUALITY setting, so it is going to be slow as hell but accurate...

See the results!