Lowering quality on the fly during playback

[AuroEdge]

Hi! I've encoded a DVD to DivX 5 video multiplexed with OGG Audio (so it's an OGM format multimedia file). Problem is, I'm trying to play it on a slower computer than what I originally played it on. The quality is just way to high for my slower computer to handle. It's specs are:
- 750MHz AMD Duron
- 320MB RAM
- nVidia Geforce 2 MX 64MB DDR

It's easily able to handle other stuff I've encoded that's at a lower bitrate. Codecs I currently have installed are:
- XviD https://www.videohelp.com/tools?tool=190#comments
- Ogg DS
- DivX 3/4/5
- AC3 Filter

I use Windows Media Player to play all of my videos. My rip will play, but it's just a bit too powerful (it plays just a little jerky, but audio gets out of sync and pops when it reaches a key frame). I've tried Media Player Classic & Winamp as well with no luck. What I'm thinking is that like with the DivX Player (the one loaded with spyware :\) you were able to change the quality from high to low. I no longer have that installed but in this case it wouldn't matter. Thanks!

[SaSi]

The DivX codec installation (even the free version), also installs a codec configuration utility (found at Start-->Programs -->DivX-->...)

Try unchecking some of the quality options and also disable the first page options (like Film Effect, etc). Each option requires processing so removing some will make decoding somewhat faster.