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VIDEO 23.98fps, AUDIO 25fps – DOESN’T SYNC
Hello!
I have been working on a project entirely shot in 25fps. Recently, I got some additional material shot in 23.98fps by mistake.
I managed to conform the video material to 25fps using Cinema Tools, but the audio, which was shot separately, was shot for 25fps.
So, when I try to sync the conformed 25fps video and original audio, after few seconds video and audio start to fall out of sync.I read somewhere that if I stretch audio by 4%, I will be able to sync it properly, but that does not work…
Does anyone know how to solve this problem?
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1 Reply
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Firstly does the audio have timecode (ie: broadcast wav files with timecode metadata). Secondly 23.976 to 25 is 4.1% The .1% matters.
So if you have changed the pictures to 25 and they run 4.1% faster, you need to correct the pitch as well as speed up the audio. Then when you load the new wav files in, make sure the FCP Easy Setup is on a 25fps preset, other wise FCP will stamp the wrong frame rate and cause drift.
If you get that formula right then you should be good.
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