Guys, if u ever try to build a DVD with a FCP rendered m2v + ac3, it would not work. You can drag the files and do everything but when you render, it hits a "invalid file error handling mpeg" or something. The fix is something i found from the forums back in 2007 which still works today!

Credits to Sebastian Alvarez:
It's a very basic program that doesn't even need to be installed, it just runs from its own executable. To fix the problem file, load it in the program, go to the User Data area, check the checkmark, and choose remove from the drop down list. Then click on the Write button and wait for it to process. Note that this program doesn't actually recompress the file, so there won't be any added compression artifacts, it just changes parameters in it. The new file will have a .0 added to the end of the name.

Restream 0.9.0 - VideoHelp.com Downloads (http://www.videohelp.com/tools/Restream)