DivXCAT 2.1

Questa utility aiuta a tagliare in maniera facile e veloce un qualsiasi filmato codificato in divx. Supporta DivX 4.x e 5.x e adesso anche XviD.

What is DivXCAT?
DivXCAT helps you split large DivX/XviD files to fit them onto multiple CDs. If you don't need to cut your video files, you don't need DivXCAT.

Problem: You've just created a large DivX/XviD file that will fit on a certain number of CDs. However, when you try to split it into parts with equal playing time, you get files of different sizes. That's because DivX changes the bitrates from scene to scene (especially with two-pass encoding) - so your splits contain the same number of frames, but different amount of data.

Problem: You use another program to split your movie every 700 MB, which is the size of one CD. However, the program cuts somewhere in the middle of a scene and you cannot tell the program to cut on a scene change you would prefer.

Solution: DivXCAT analyzes your AVI file or (to save time) the log file (divx.log) created by your DivX V5.0.3+ encoder and tells you where to split to get files of equal size. It considers both the video and audio bitrates. You search a preferred position to cut near the proposed position and cut the movie with your favourite video editor.

DivXCAT does NOT split the AVI files itself - it shows you WHERE to split it. Use your favourite video editor to do this.

DivXCAT shows you where you can split a movie for two to four CDs. If you want to split a movie onto more than four CDs, contact me and I may be able to add that feature.

How to use DivXCAT
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!
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).
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.
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.
Load your movie into your video editor, then use the cutting positions shown at the bottom of the DivXCAT window to split your movie.
Tip: You can click a cutting position in DivXCAT to copy it to the clipboard, then press Ctrl+V to paste it into your video editor's jump to frame dialog.

(1) The idx1 index contains the position of every frame in the avi. When your avi contains this index, loading an avi is quicker.



How it works
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.)

Options
Accumulated Bitrate of all Audio Streams: Sum the bitrates of your audio streams together and insert the value in this text field. If you have two 128kbps MP3 streams, for example, insert "256".

Framerate: Number of frames per second of your movie.

CD size: This is the size of the CD-R/RWs you want to burn the avi files onto.

half-filled CDs: Sometimes, you may want a movie to fill 1.5, 2.5 or 3.5 CDs. This option does not mean to fill all the CDs only to a half, but it allows to have a half CD at the beginning or the end of the CD set. An example is that you have a TV-movie that was produced in two parts and want to burn them onto three CDs: The first movie onto CD 1 and 2, the second onto CD 2 and 3.

Force first CD filled half: In the example above, you need to cut the second movie so that the half CD-part is at the beginning. Selecting this option also forces e.g. a movie that exactly fits on 2 CDs to be partitioned into three parts of size 1/2 CD + 1 CD + 1/2 CD.

1st Value to Clipboard: If this option is checked, the first cutting position is copied to the clipboard after calculating the cutting positions. You can easily insert that number in a jump to frame dialog of your video editor then.