There does not seem to be a Crunch Windows forum so trying my luck here.
I have been using Crunch to convert my AVIs, DIVx, etc files for Apple TV. In general it seems to work fine, but there are some AVI files that Crunch does not seem to be able to convert. When it gets to one of these files it starts the conversion and within a minute exits the conversion process. It does not jump to the next file in the list.
These files play fine in the Windows Media Player.
I even tried one of them with iSquint the Mac freeware and it handled the file fine.