Can q-pel cause problems?

[BluDChyLD]

I've kept it on for my encode and it seems ok (only done one movie so far though). But reading everwicked's guide he says to enable only bi-directional and gmc. I know that people have been experiancing problems with gmc, so wouldn't it make sense to enable q-pel instead of it?

Bottom line, have any of you guys experianced any problems with q-pel so far?
Thanks,
BluDChyLD

[quickstang45]

I have encoded 3 movies now with divx 5.0. The last one I did, I used qpel. I had terrible artifacts, it also slowed my encoding down a lot. I use gmc and b frames and have great results.

[BluDChyLD]

what kind of artifacts are you getting? Maybe it only works using low bitrate/res...
BluDChyLD

[quickstang45]

It was weird, I was getting artifacts on peoples faces really bad. It also had trails during action scenes. The bitrate I used was 800 and the res was 640xXXX I forgot the exact res and its encoding right now with qpel off. The two other vidoes I did without qpel and gmc and b frames on look great.

[BluDChyLD]

that's strange, I haven't watch the DivX 5 encoded movies yet so I havent been able to look for artifacts properly. I might do an encode without qpel and see what it's like. As for GMC, after people started reporting the squares in the video because of it I decided to leave it off.