Audio sync/duplicate frames issue ASP 9

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basshole
Posts: 439
Joined: Tue Feb 12, 2008 1:11 am

Audio sync/duplicate frames issue ASP 9

Post by basshole »

Hi folks. Long time no post.

So I created something in ASP 9, exported as QT movie, brought movie into Apple Motion, did stuff, exported, editing In Premiere. Everything looked okay, but I notice in Premiere, when I try to sync up my recorded voices with the lip movements, matching how I did it in ASP (putting the audio clips in premiere so that first sound = first lip movement, same way I have it arranged in ASP so no reason shouldn't be accurate), it's slightly off. Also noticed that in Premiere, I'm seeing some duplicate frames. Like, I will actually scroll through the timeline frame by frame watching the lips and see that sometimes the same image repeats before moving to the next. Can't think of why it would do this.

Everything should be 24fps (in video world it's 23.98). So Premiere sequence/timeline is 23.976 (really 23.98), Apple Motion settings were 23.98. Just noticed I had ASP set to 24, not realizing (since there's no drop down box with selectable framerates) you could even set it to 23.98 (you can. I manually entered it and it stuck next time I opened project settings). Is this the issue, do you think? It's not a long project by any means but framerates be cray cray don'tcha know.
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slowtiger
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Re: Audio sync/duplicate frames issue ASP 9

Post by slowtiger »

Uhm, I've never heard of frame rates like "23.976" to be in use. I work in 24 or 25 and never had syncing problems.
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basshole
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Re: Audio sync/duplicate frames issue ASP 9

Post by basshole »

As I said, It's a video thing probably more than an animation thing. I'm integrating this with live action. Unless you're working with actual film, video at "24fps" is actually always at 23.98/23.976 (when shooting or posting). Just like 30 fps video is really 29.97. It's an NTSC thing. Has to do with audio sync over time.
basshole
Posts: 439
Joined: Tue Feb 12, 2008 1:11 am

Re: Audio sync/duplicate frames issue ASP 9

Post by basshole »

Ok so did a test. exported one of the movies from ASP at 23.98 and brought it into Premiere, attempted to sync the audio again with this new file. Bammo. That was it. So kids, always check your framerates and make sure they match.

It may be totally unnecessary even in NTSC to be 23.98 if NOT working with live action footage (i.e. just voice and animation). I did my first project in ASP, which was like that, in 23.98 cause it's what I'm used to so I'm not sure. Maybe someone can provide insight. However, considering it could be in a film festival or distributed somewhere (broadcast for instance) that might require it conform to 23.98 (many do), it seems smarter for me to stick with that since there's no harm and to not do so could cause headaches down the line.
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