1024 x 576 H.264 unwatchable due to video stuttering

The video is an mp4 and was encoded (by people who should know what they are doing) and is listed as being iPad friendly.
When I watch the video the audio is fine but the video itself stutters constantly.
Oddly enough watching the video in iTunes leads to no audio but video is fine.
Any suggestions?
Message was edited by: ShaneGC

The video is an mp4 and was encoded (by people who should know what they are doing) and is listed as being iPad friendly.
MP4 is a file container. Are we talking about MPEG-4 or H.264 (MPEG-4/AVC) video content in the MP4 container? (I.e., there are different display/data rate restrictions here for the iPad which may not apply to the video as being played back in iTunes. As to the audio, don't know why there would be a problem but knowing what the audio compression format/specs are might give us a starting point for possible problems.

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