1. Open Program Options dialog and select Video in left tree. Select DivX® 6.5.1 Codec from the codec list and click on Properties button.

2. Select 1080HD mode in Certification Profile (1) if you have a Pro version of DivX codec you also can select Unconstrained profile. Other profiles are not supported for motion capture.
3. Set Rate control mode (2) to 1-pass. Others are not supported.
4. To control encoding quality you can change Bitrate (3) and/or use slider (4).