Bad quality rip, how to fix?

[Mortal_Takeda]

I ripped a DVD with some video clips on it. I followed the instructions of the XviD guide (http://www.doom9.org/index.html?/xvid.htm). Everything went well. The clips I ripped were very high quality and the files were very small, approximately 50mb for a clip of 5 minutes.

But the quality of just one clip was very poor, but I ripped it the "same" way as the other clips I've ripped. I took this screencap:

http://i4.photobucket.com/albums/y147/Mortal_Takeda/snapshot20050424181136.jpg

If you want to know how it "should" look like, click here (http://i4.photobucket.com/albums/y147/Mortal_Takeda/snapshot20050424181203.jpg)

I did found a way to get the quality I wanted by increasing the bitrate, but the result was a video clip (4 min) of over 200mb in size.

Could someone explain to me why the quality of this video is so low compared to the other clips I've ripped. Is there a way to fix this?

[E-Male]

some clips compress better than others
as simpel as that

in this it looks liek the floor is coveres with fog or smoke
that's not good for the compression

you might get better subjective quality at low bitrate with doing some filtering

[Mortal_Takeda]

Well, it's not just the floor, but it's in the whole video. I could make more caps if you want. But what filter would you suggest I should use? I don't know much about filters yet.

[E-Male]

if one part of the video pulls many bits to itself all quality suffers

well, read avisynth.org this forum
get to know filters and try them

[Mortal_Takeda]

Ok, thanks for your help, I'll try that :)