When you need to fix AVI file, first decide if the problem is associated with only one such file or several AVI files. If the rest of the videos work fine, then the problematic AVI might be the cause of the issue. Duplicate the file first and try opening the duplicate using another media player that is compatible with AVI format. If the AVI video was recently copied or downloaded from somewhere else, then getting a new file might help. For the truly damaged videos, special repair or recovery software can help in restoring some usable parts of the file based on the existing data. Notchox could be used for this purpose.