No Sound for AVI file using Dolby Played back via Totem

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http://www.linuxquestions.org – I have this one AVI file legally downloaded from Veoh, which, however, I cannot playback. If I try to play it back under Totem 2.26.5, (GStreamer 0.10.25), I can see the video, I get no obvious error messages, but I get no sound no matter what I set the volume to: other files I get sound. Under Properties, I see for the Audio codec: Dolby Digital (AC-3). I am running Fedora 11 with all the updates. (HowTos)