iPod plays video but not audio of some exported files
Symptoms
If you have an iPod capable of playing videos (currently the Fifth Generation iPod), you can play videos purchased from the iTunes Store on your iPod. You can also use QuickTime Pro or iMovie HD to export video files in the right format for iPods that support video playback. For conversion instructions, see these articles:
Products Affected
iPod, iPod touch, iPod nano (3rd generation)
Resolution
If you've exported a video for iPod play, you may come across a situation in which the converted video doesn't contain any sound when you play the file in QuickTime Player, iTunes, or on your iPod. If this is the case, the original video file may be in a format that contains muxed (multiplexed) audio and video, and cannot be exported with audio.
To determine if your movie file is muxed, follow these steps:
- Open the original movie file in QuickTime Player.
- From the Window menu, choose Show Movie Info.
- Click the More Info disclosure triangle in the Movie Info window (if it's closed).
- Note the entry next to Format.
Additional Information
If the format is "MPEG1 Muxed" or "MPEG2 Muxed," the audio portion of the file may not be retained with QuickTime Pro or iMovie. Please see this article for more information.