After more testing, apparently the hanging of the conversion and partial removal of the audio when overwriting a datecode is due to file size. All of my avi files that were 2.3 GB or smaller converted without hanging and the audio fully intact. All of my avi files 4.4 GB and larger hung during conversion and were partially missing audio. At this point, I have no avi files between 2.3 GB and 4.4 GB.