DivFix

DivFix is a multiplatform app capable of restoring corrupted AVI and DivX files by reconstructing the streams that make up each one.

You can also use it to preview AVI files that are being downloaded via ed2k, torrent, FTP, or web download, even if they don't have the part belonging to the index.

If you don't want to repair a file directly, DivFix can simply check for all existing errors. The Strip Index option allows you to eliminate the index, but you want to be careful with this option: the file then won't be recognized by the majority of multimedia players.

DivFix can also be used from the command line. To see how, check the instructions on the program's webpage.