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Having the weirdest-ever picture/sound sync issue with FCP
OK I need some help from a FCP guru
I just started cutting a sequence on FCP 5.1
All the dailies were captured through a Kona card from HD Cam at DVC Pro HD resoluton. I went through all the dailies and they look and sound great.
I then put a clip in the source side and selected an in and outpoint. I hit t he red overwrite button. In the timeline it places the video and audio tracks. The simplest most basic edit possible. However when I play the sequence the sound is far out of sync with the picture (like 3 or 4 seconds). I play the in to out point in the source and they are in dead sync.
I quit the program and relaunched. Same exact issue (and same sync offset). If I make a sequence of clips from various dailies shots, some are in sync and some are way off.
I dont think its a hardware pipeline issue. I am reading my footage off a G-Tech G-Raid 1 TB FW 800 drive. I’m on a Quad 2.5 G5 with 8 GB of ram running FCP 5.1 Universal. I’m on Mac OS 10.4.8.
Has anyone seen this wierd issue or does anyone have any ideas about how I might solve it?
Thanks!
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6 Replies
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Is your sequence set up to play the same codec and frame rate you captured in? You have to make a new sequence after choosing the appropriate easy setup. Then delete Sequence 1 as it has ‘old’ settings.
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I thought of that too… but the seq gives me no red “render” lines. It plays the pix and sound back perfectly, just on some particular clips the sound is not in sync with the picture. Then on others cut in the same way, it is…
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Well, your drives are BARELY fast enough to handle 1080i DVCPRO HD, that could be your problem.
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Hi Jeremy-
That was one of my initial assumptiosn up front. It wouldnt explain why some clips would be in dead sync surrounded by clips that were 20 frames off….
But to get around that thought, I copied all my media to a GSpeed Raid with Fiberchannel. It has handled uncompressed HD before, so I was sure it could handle any drive speed issues… Again, same exact problems… I am beginning to think it could be some kind of frame rate issue with the sound/picture running at different rates…
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Did you capture this material and how? Are those offending files out of sync when you open them in quicktime?
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Good question: are they in sync in QT player? Were they synced dailies on the HDCAM? How long are your captured clips?
When I do HD finishing with 8 channels of audio (5.1 + stereo) I have to keep all the aiff’s on an internal SATA and have video only on the XRAID – otherwise the sync gets drifty. But with DV-HD the data rates aren’t that high at all.
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