DivXCAT tries to divide the movie into parts so that each part will have the same size after cutting.

After calculating the overall size (with audio streams included) and the number of CDs the movie will take, it can calculate the size every part should have. Then DivXCAT tries to find a position where the amount of data for the video and audio (depending on the running time) is nearly this big.

When opening an avi file, the idx1 index list is read if it was found. If not, the avi file itself is scanned for video frames. The text next to the filename shows you if a log was loaded, an avi with idx1 usage (both with a small loading time) or the complete avi file was scanned. In both cases, the framerate of the video is read from the avi and set in the combobox.

If you encounter a strange behaviour of DivXCAT with AVI file usage such as obviously wrong proposed cutting positions drop me a mail! (Slightly different cutting positions after loading an avi file compared to using the log file are normal.)

How to use DivXCAT

1. Encode your movie using the DivX/XviD encoder. When using DivX 5.0.3+, make sure to switch on the update log file option in the encoder settings. If you don't, the log doesn't contain the correct information about the encoded frames and DivXCAT will calculate wrong values!
2. Start DivXCAT and load the avi file or the divx.log file (which will save some time when your avi doesn't contain an idx1 index(1)) that's created by DivX. There are four ways to start DivXCAT:
* Start DivXCAT. Then drag an avi or log file from Explorer and drop it on the DivXCAT program window.
* Start DivXCAT. Use the File button to browse for a file.
* Drag an avi or log file from Explorer and drop it on the desktop icon of DivXCAT.
* Right-click on an avi or log file in Explorer, then select Open with DivXCAT in the context menu (only possible if you let the installer add DivXCAT to the context menu of these files types).
3. Select the CD size, the movie's framerate (automatically set when loading an avi) and the audio bitrate (automatically considered when the avi contains audio) that all audio streams will have in total.
4. By default, DivXCAT shows you where to split the file into equal parts. However, you may prefer to fill all CDs except the last, leaving it partly filled. To do this, select the half-filled CDs allowed checkbox.
5. Load your movie into your video editor, then use the cutting positions shown at the bottom of the DivXCAT window to split your movie.