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| Moving Pictures This area is for discussing any technology that creates moving pictures. Topics in the past have covered favorite avant garde films, old TV sitcoms, animation, current trash TV, TV news, making movies, home brew video, video equipment, and multimedia. |
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#1
 2008-12-26, 20:44
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starjones 
Regular
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syncing audio and video
so i have downloaded movies for my ipod from google and at first, everything syncs up fine, but throughout the movie, the audio becomes progressively more and more out of sync with the video.
is their a program i can use that will allow me to fix this w/ out me having to go through every five minuets of video to sync it?
since it becomes more and more out of sync obviously.
like a program that i can tell to do something like this:
every 5min the videos audio becomes out of sync by 1.5 seconds, so i want you to do the math and fix the whole thing.
example:
movie=60min
60min/5= 12
12*1.5= 18
so that would mean by the end of the movie, the sound is 18 seconds off.
that means in the middle of the movie, the sounds 9 sec. off.
so if i tell it to time the audio 18 seconds early, then it wont fix it (it will inverse what i already have and make it 18 sec. off at the beggining and good at the end)
you get what im saying?
so is their anything that can let me do this?
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#2
 2008-12-26, 22:51
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overlooking the lunatic fringe
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Re: syncing audio and video
Quicktime Pro allows you to choose frame rate. When your movies/videos were stripped, the SMPTE timecode was left off. You need to re-sync the audio to the original frame rate of the encoded product.
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#3
 2008-12-26, 23:59
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starjones 
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Re: syncing audio and video
Quote:
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Originally Posted by mizled
Quicktime Pro allows you to choose frame rate. When your movies/videos were stripped, the SMPTE timecode was left off. You need to re-sync the audio to the original frame rate of the encoded product.
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can you translate this for an idiot?
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#4
 2008-12-28, 16:48
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Regular
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the happy land of australia
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Re: syncing audio and video
you need to change the framerate, odds are it is the cause of your problems. presumably its a NTSC vs PAL issue. im not sure of what apps do this on windows.
the easiest thing to do would be to stretch (or shrink) the audio. it might be hard to get it perfect, but it should give you resonable results without having to re-encode the video.
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