Hi,
I have discovered that some MOV video files have this problem too.
Before Edgy, I have used Dapper, and with Dapper these video files (MP4,
MOV) played well in GStreamer.
** Changed in: totem (Ubuntu)
Status: Needs Info => Unconfirmed
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Edgy: no audio for mp4 files
https://launchpad.net/bugs/71689