ksproul
29th August 2006, 15:10
I posted this on VideoHelp, but thought I'd try here as well. Here are my original post, and an update:
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I did a lot of reading about similar problems before posting this, but didn't see any that were exactly the same as mine, at least not with a working solution, so I thought I'd try posting here.
I captured an 85-minute DV video in Adobe Premiere Pro 1.5 via firewire from my Sony DCR-TRV730 camcorder (Digital8). The video captured just fine, and when I play the AVI back in a program such as Media Player or VLC, it plays fine, with audio and video 100% in sync throughout. The problem comes when I take that same AVI and put it on a timeline in Premiere. When I do that, the audio and video are out of sync (video trails the audio by maybe half a second) by the end of the video. They start out in sync, but slowly drift as the video goes on. It does not correct the problem if I stop and start playing it in the middle. I can start right near the end, and it will be out of sync as soon as I hit play. This is without any editing whatsoever, and it affects both previewing in Premiere and exporting the movie (same sync issue either way).
I've read some possible workarounds to problems like this, but I'm more interested in correcting the problem than working around it. Any ideas on what could be causing this and/or how I can fix it?
Thanks,
Kris
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I've done some further investigation on this and may have found the culprit. I noticed that the framerate of the captured AVI file is either 29.972 (according to GSpot) or 29.971 (according to VirtualDub). Since Premiere seemingly will only play it back at exactly 29.970 fps, it makes sense that the video would be lagging behind the audio slightly, especially after 85 minutes. Why it works fine in other programs, I don't know. Maybe the other programs play it back at the actual framerate, rather than the set 29.970. Anyway, I haven't found a way to fix this in Premiere yet. Adjusting the framerate in another program doesn't seem to help, since Premiere is still going to play it back at 29.970 regardless.
As another attempt, I tried capturing the video using WinDV, rather than Premiere. When capturing a type 2 DV file, I actually run into the sync problem outside of Premiere as well, meaning the WinDV-captured file has the same sync problem when played back in WMP, VLC, etc. I'm not sure why this is. So I tried capturing a type 1 file in WinDV, just to see what would happen. The file is perfectly in sync when played back with WMP, VLC, etc. I also tried opening this file in Adobe Encore DVD (which had experienced the same sync problem as Premiere did with the original file), and this time it had no sync problem. So I tried bringing the file into Premiere, expecting it would solve my problem. However, Premiere sits there generating the peak file, then freezes when it hits 100%. It only does this with the type 1 file. I thought Premiere Pro was supposed to support these files. Before running the full video in, I had even captured a shorter type 1 file in WinDV and imported it into Premiere with no problems. It's just the full 85-minute type 1 file that Premiere won't finish opening.
So that's where this stands right now. I'd love to get this working either using the type 2 or type 1 file. I'm convinved that the type 1 file will solve the problem if I can just get Premiere to finish opening it.
I'm also aware that I could solve the sync problem by changing the duration of the audio, but I shouldn't have to do that, and I'm more interested in getting it in sync in its unaltered state.
Any ideas? Any help would be greatly appreciated!
Thanks,
Kris
-----
I did a lot of reading about similar problems before posting this, but didn't see any that were exactly the same as mine, at least not with a working solution, so I thought I'd try posting here.
I captured an 85-minute DV video in Adobe Premiere Pro 1.5 via firewire from my Sony DCR-TRV730 camcorder (Digital8). The video captured just fine, and when I play the AVI back in a program such as Media Player or VLC, it plays fine, with audio and video 100% in sync throughout. The problem comes when I take that same AVI and put it on a timeline in Premiere. When I do that, the audio and video are out of sync (video trails the audio by maybe half a second) by the end of the video. They start out in sync, but slowly drift as the video goes on. It does not correct the problem if I stop and start playing it in the middle. I can start right near the end, and it will be out of sync as soon as I hit play. This is without any editing whatsoever, and it affects both previewing in Premiere and exporting the movie (same sync issue either way).
I've read some possible workarounds to problems like this, but I'm more interested in correcting the problem than working around it. Any ideas on what could be causing this and/or how I can fix it?
Thanks,
Kris
-----
I've done some further investigation on this and may have found the culprit. I noticed that the framerate of the captured AVI file is either 29.972 (according to GSpot) or 29.971 (according to VirtualDub). Since Premiere seemingly will only play it back at exactly 29.970 fps, it makes sense that the video would be lagging behind the audio slightly, especially after 85 minutes. Why it works fine in other programs, I don't know. Maybe the other programs play it back at the actual framerate, rather than the set 29.970. Anyway, I haven't found a way to fix this in Premiere yet. Adjusting the framerate in another program doesn't seem to help, since Premiere is still going to play it back at 29.970 regardless.
As another attempt, I tried capturing the video using WinDV, rather than Premiere. When capturing a type 2 DV file, I actually run into the sync problem outside of Premiere as well, meaning the WinDV-captured file has the same sync problem when played back in WMP, VLC, etc. I'm not sure why this is. So I tried capturing a type 1 file in WinDV, just to see what would happen. The file is perfectly in sync when played back with WMP, VLC, etc. I also tried opening this file in Adobe Encore DVD (which had experienced the same sync problem as Premiere did with the original file), and this time it had no sync problem. So I tried bringing the file into Premiere, expecting it would solve my problem. However, Premiere sits there generating the peak file, then freezes when it hits 100%. It only does this with the type 1 file. I thought Premiere Pro was supposed to support these files. Before running the full video in, I had even captured a shorter type 1 file in WinDV and imported it into Premiere with no problems. It's just the full 85-minute type 1 file that Premiere won't finish opening.
So that's where this stands right now. I'd love to get this working either using the type 2 or type 1 file. I'm convinved that the type 1 file will solve the problem if I can just get Premiere to finish opening it.
I'm also aware that I could solve the sync problem by changing the duration of the audio, but I shouldn't have to do that, and I'm more interested in getting it in sync in its unaltered state.
Any ideas? Any help would be greatly appreciated!
Thanks,
Kris