TIPS for using cfourcc:

1. Always backup your files before changing the FOURCC code, especially when using the '-f' (force) option.
2. If you are unsure which codec code to use, refer to the 'codeclist.txt' file included with this distribution.
3. Some players may require both the Description and Used fields to be identical. Use `-u CODE -d CODE` to set both.
4. If a file is not recognized as an AVI file but you are sure it is valid, try the '-f' flag, but be cautious.
