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It depends on the specs of the computer and other variables. Perhaps include a bit more information, but as a general question it could take that long.
 
im using a 12" powerbook 1.5gz 512mb superdrive. its only 15% done and its been like 4 hrs.
 
I've got a Dual 2GHz G5, and when I do a 2 pass encode in x264 it will take around 8 hours for the average length film.
 
AudiGuy said:
im using a 12" powerbook 1.5gz 512mb superdrive. its only 15% done and its been like 4 hrs.

That's h.234... it takes ages... MPEG 4 normal takes me 2.5 hours for a 2hr film.
 
SpaceMagic said:
That's h.234... it takes ages... MPEG 4 normal takes me 2.5 hours for a 2hr film.

yeah, using ffmpeg to encode is a lot quicker than x264, but x264 looks a lot better at the same filesize and is worth the extra time.
 
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