I use the very useful Apple TV Fooler script to massage divx videos into .mov files that will sync/stream from iTunes to apple tv. It does this by adding a short empty audio/video stream to the beginning of the movie. This is 0.5 seconds of black video and no sound, encoded as H.264 and AAC respectively. The original divx movie (encoded as xvid/mp3) are still there - right after the first stream which is just there to fool iTunes. When iTunes looks at such a file it appears it only checks the fist stream. That stream is encoded with codecs that apple tv knows about, so iTunes allows it to sync/stream. Because I use atv Flash and have the additional codecs loaded, these TV shows and movies play just fine. I like this approach and it has worked well for me until now.
I updated to apple tv 2.4 and then aTV Flash 3.6.1 and I no longer get audio. These files still sync/stream to the apple tv and the video stream works just fine, but I’m not getting audio any more. Hopefully I just messed up the install and there is an easy fix. Has anyone else run into this problem?