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drifting sync over time

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William Miller
drifting sync over time
on Sep 15, 2010 at 8:15:55 pm

Hi everybody,
I received a video file ( H264, 1280 x 720, 23.98, 44.1 Khz 32 bit floating ) that is 8 minutes and 18 seconds in duration. When I play it in QT it remains in sync, when I play it in FCP ( v6.06 on an iMac 2Ghz Core 2 Duo) it drifts out of sync. It gets about 4 frames out around 5 minutes in. I dropped it into my sequence and had the sequence adjust to the clip's parameters including the 44Khz. Any ideas why it would drift out of sync. I don't know what camera it was shot on or how the file was made, sorry.

Jon Miller
404-216-6021
wjonm2002@yahoo.com
http://jonmiller.tv


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John Fishback
Re: drifting sync over time
on Sep 15, 2010 at 8:22:53 pm

You need to convert the H.264 to an FCP editable codec (which H.264 isn't). Any of the codecs shown in FCP's Easy Setups are edit codecs. Most folks would convert the H.264 to ProRes. BTW, convert your audio to Linear PCM, 48kHz, 16 or 24 bit.

John

MacPro 8-core 2.8GHz 8 GB RAM OS 10.5.8 QT7.6.4 Kona 3 Dual Cinema 23 ATI Radeon HD 3870, 24" TV-Logic Monitor, ATTO ExpressSAS R380 RAID Adapter, PDE enclosure with 8-drive 6TB RAID 5
FCS 3 (FCP 7.0.2, Motion 4.0.2, Comp 3.5.2, DVDSP 4.2.2, Color 1.5.2)

Pro Tools HD w SYNC IO & 192 Digital I/O, Yamaha DM1000, Millennia Media HV-3C, Neumann U87, Schoeps Mk41 mics, Genelec Monitors, PrimaLT ISDN


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William Miller
Re: drifting sync over time
on Sep 15, 2010 at 9:00:35 pm

Thanks John, sounds like a job for Compressor.

Jon Miller
404-216-6021
wjonm2002@yahoo.com
http://jonmiller.tv


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