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changing the speed of video or audioPosted by zipperplug
Hey folks - I am trying to change the speed of my video and audio to take care of a sync problem.
I figured out that the speed needs to be adjusted to 99.895833% to match the audio which was recorded at a different frame rate, but when I tab to a different field, FCP rounds the number to 99.90%. Is there a way to stop this? It happens even when I control-click the clip in the timeline to change the speed.
one approach to this is to use FIT TO FILL.
i find an accurate sync point as close to the beginning of the clip as possible, and another one as close to the end of the clip as possible. generally i'll do this in the timeline, and use markers on the audio then i mark those sync points with in/out points. on the pic in the timeline, and on the sound in the viewer (as i've added markers in the timeline, i generally double click the timeline version into the viewer, alternatively, i'll trim my sound to the sync points in the timeline, then open in the viewer) then i do a FIT TO FILL edit, which stretches the sound to fit to the picture. 99.895833% vs 99.90% that's 1 frame every 100,000 frames, or a frame over an hour. how long is your piece? nick
The issue is that the video was recorded at 23.976 and the audio was 29.97. There is a noticeable drift after about a minute or so.
I tried the FIT-TO-FILL option, and it did not work. In fact, when I did it, the audio block in the timeline still shows that the audio is playing at 100%, as if no audio was stretched. The clips are also in WAV format and Soundtrack Pro (which I've never used) is saying it only accepts AAF or OMF? Is that true? Searching on the Soundtrack Pro forums now.....
Ooh. Now that you mention it, there's wave agent which let's you modify the headers on a WAV file.
www.strypesinpost.com
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