I have a problem with version 5.2.x… I am trying to convert episodes of tv shows to a mobile format and about 50% of the time the operation fails. The operation starts successfully and then fails at between 15-25% completion rate. The time remaining goes to 0 and the time elapsed continues to count upward. It will sit there for hours and not actually convert anything. I still have version 4 installed, it still works correctly, not sure why I am having problems with 5.
Since you didn’t say…I’m assuming you mean DVDFab?
If v4 works, use v4 or try a different version of 5. There may be more information in the DVDFab forum.