15 Frames Off-Sync Audio and Video
Hi,
I have been capturing 1 school concert and 1 Town Chamber Holiday Party and they are all getting 15 frames off sync. I tried to capture in 2 cameras (Canon Xh-A1 that I shot with, and HV30 that use as a deck). Both camera pushes audio 15frames behind. They both shot in A1 HDV mode with 60i frame rate. I am trying to edit on HDV 1080i 60i timeline. I am using CS3 version of Premiere Pro and I am not sure what's going on. If there are any more settings you need to know to help me out here, please let me know then I post'em. My Chamber director really wants them in HD on their website so down converting is not an option here. Thank you tons ahead. JJ |
Capturing is a simple transfer of 0's and 1's. Nothing is changed during the transfer. Either the camera did not work correctly, or your system/setup/project is wrong for what you shot. Capturing can not cause a 15 frame out-of-sync. Maybe a dropped frame causes this. Give some more details.
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I was using both XH-A1 and HV30 to capture, so I doubt both cameras have same problem.
The project setting is HDV 1080i 60i and was shot in HDV 1080i 60i. There was no dropped frame throughout the tape. When I captured some other tapes in DV, nothing ever happened. I am going to try to capture in DV project as HDV clip to see if same thing happens... |
What version of CS3 are you using? Is it updated to version 3.2?
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Is there any known bug for this version? Thanks. JJ |
Never experienced this problem you are describing. You can try to capture with HDVSplit and see if you still experience this problem.
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You could try replacing the ImporterFastMPEG plugin with this one - it was given to me by an Adobe tech to fix a bug in CS3 with the way it handles Canon 24F footage...it may fix your problem as well - but I can't promise anything!
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How long are the segments that you are capturing? Anything over half an hour can cause the audio not to line up correctly.
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I guess if nothing else works you could shift the audio over in the timeline but that's a fix you shouldn't have to do.
I, myself, hate when things don't work properly or as they should so I understand your pain. Kinda crappy problem. I'd love to hear what the solution is if you figure it out! |
Audio Drop Out - Drop Frame GOP
What you are experienceing is very common, we fight this in our HDV workflow. When a drop frame occurs, the audio goes out of sync during capture usually 15 frames. The I frame seems to be the sync point for the audio, and if the P and B frames are gone, the audio drifts. It is a nightmare in post.
Here is my work around. It is a pain, but it has helped me save time in the long run. We started using HDV Split, (We used to use Scenealyzer) and set the program to stop captureing on a frame drop. I will then simply start capturing again after that point, and know where the drop out is, is a problem, but from there on, the tape captures and audio stays in sync. If this is what you are experiencing, it sure beats re-syncing and searching for that dropped frame point. If not... Have your camera's been serviced? Maybe there is a head clog. Do you have a Raid you are capturing too? I would test the Hard Drive Speed capture rate. What kind of tape are you using, are you switching tapes? Stick with one brand, and if you are going with a cheaper brand, don't reuse the tapes - We get more dropouts with used tapes. less than 15% with new tapes. Hope this helps... George Colorado Digital Video |
thank you very much, George.
Here is my reply for your question, Quote:
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Premiere just isn't very good for capturing and doesn't like HDV much. (I end up editing in Premiere with Cineform - much happier)
HDVSplit is great, I haven't tried the stop-on-frame-drop work around though. What works for me is running clips through MPEGStreamclip (free) and checking "fix timecode breaks". |
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