I can't find this anywhere on the web. I successfully converted an AVI to FLV, but the quality wasn't very good, but that is because the AVI isn't very good. So I ripped it again with higher quality into an m4v format. It took over an hour for a 12 minute video only to say this error at the end:
The operation could not be completed because an error occurred.
Is there a list somewhere of the source video files supported?