Our tests and the experience of other users inidicates the issue isn't related to the Encoding selected in Podner, or even Podner itself. The issue is centered on specific files, not all AVI's, and can be duplicated with the same files if the user tries to export them from QuickTime Player. If a file's audio plays correctly in QuickTime Player but Podner fails to include audio in its final output, we suggest users install the latest 3ivx QuickTime component, available at
http://www.3ivx.com/download/macos.html , process the original file with DivX Doctor II, available at
http://www.3ivx.com/coral/DivXDoctorII2.2.dmg , then process DivX Doctor II's output with Podner. If the audio does not play correctly from QuickTime Player then Podner will not be able to work with the audio, either. In that case, the audio is most likely encoded in AC-3, for which we are still searching for a reasonably elegant solution.