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Synchronise
Have been trying out the Synchronise function and getting very frustrating results. If I edit the video into a timeline and then attach the audio at the clap then everything is gravy and stays in sync. If I synchronise the two shots it does not get it right (which is annoying but fixable), but the audio also slips slowly out of sync as if there is a sample rate issue (but both are 48). To fix, I have to double click to load the shot in the timeline and then slow down the audio to 96%.
Video is 1080p25 from a Canon 7D, audio is a WAV 48khz from a Zoom.
Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net -
7 Replies
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Is the timeline 25P as well?
Or is the timeline 23.98.
If you expand the waveforms and look at it do the waveforms go out of sync as well?
David
______________________________
The shortest answer is doing.
Lord Herbert
https://vimeo.com/battistella -
Sequence is set to match video at 1080p25 and in the sequence they stay in sync. But if I select them both in the event library and choose synchronise they are out and if I double click on the synced clip it loads up in the timeline and even if I line up the claps, they drift out of sync, both visually and audibly.
Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net -
A little more info. If I open up the synchronised clip in the timeline I can get the two to roughly sync up by retiming the audio to 96%. Which is the difference between 24 and 25 fps. So I would guess that is the issue. But how exactly do I force FCPX to interpret the audio correctly at 25fps? It seems to do it right when editing it into a 25p sequence but not when putting it into a 25p synchronised clip. It also insists on rendering every time I create a synchronised clip, why?
Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net -
I’d submit this to Apple. It sounds like they have done the classic, “ignore 25P for now because that is not what we use in the US” move.
This is a feature that should work correctly.
David
______________________________
The shortest answer is doing.
Lord Herbert
https://vimeo.com/battistella -
You can only synchronize 23.98 footage. No 29.97 or 25.
It also turns everything in 720p.
You can fix that though, at least. Cant fix the frame rate. -
The rendering is because its resizing your clip to 720p.
You can make it 1080p by going into the Info Pane, then selecting from the little gear in the lower right corner “Edit Compound Clip Settings”. You can fix the frame size, but you can’t fix the frame rate.
This is why your audio is falling out of sync.
This is a major bug that limits use of the auto Synchronize feature to 23.98 footage.
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That’s insane. They only tested this amazing feature with 720p23.98 footage? Is that even a format that anyone shoots? I think the working around for now is to do a compound clip with the footage manually sunk (synced? what is past tense of sync??) and then edit that into the project.
Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net
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