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there are 120 threads on this topic so if you wanna you've gonna have to search. wanna do that?
 
ultimately I find I get the best results using Handbrake, even though the ui isnt that great and it isnt the most prettiest of apps, its free, its fast and it works well.
 
I've got loads of old H.264 dvd rips created with Super, they should work on the iPad right? (resolution is a bit low)
 
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