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Best way to convert 30fps to 29.976fps and still keep sync?

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john slately
Best way to convert 30fps to 29.976fps and still keep sync?
on Jun 1, 2011 at 10:14:56 am

I need to convert a video from 30fps to 29.976fps (DVD), and still keep it in sync with audio.
Could someone tell me what is the best way to do this?

Thank you!


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Roland R. Kahlenberg
Re: Best way to convert 30fps to 29.976fps and still keep sync?
on Jun 1, 2011 at 10:34:43 am

UNtil you get a definitive answer, try slowing down both audio and video by 1%. Test this out on a 15-30 second segment before committing to the entire clip.

Fingers Crossed!
RoRK

AE Training in South East Asia. AE templates for sale and rental. Click here for more


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Kevin Camp
Re: Best way to convert 30fps to 29.976fps and still keep sync?
on Jun 1, 2011 at 2:23:50 pm

this is pretty much the same as what roland said, but in a different way...

if the audio is in the clip, try selecting the clip in the project window. then choose file>interpret footage>main and conform the frame rate to 29.97.

drag that onto the make comp icon and ram preview portions of it to check the result. there may be a slight pitch change, but i'm not sure how detectable it would be.

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW


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Dave LaRonde
Re: Best way to convert 30fps to 29.976fps and still keep sync?
on Jun 1, 2011 at 4:35:34 pm

[john slately] "I need to convert a video from 30fps to 29.976fps (DVD)..."

It would seem that your footage is on DVD. The possibility exists that the footage is already at 23.976. DVD players the world over easily can add the necessary 3:2 pulldown to create a 29.97 frame rate.

I would recommend examining that possibility first.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Todd Kopriva
Re: Best way to convert 30fps to 29.976fps and still keep sync?
on Jun 1, 2011 at 5:34:27 pm

If the original poster actually meant 29.97, not 29.976 (which is no normal frame rate), then I have a small correction to make to Roland's suggestion. The factor for retiming is 0.1%, not 1%. (29.97 is 30 * 999/1000, not 30 * 99/100.)

Sorry for being the nitpicker. ;-)

BTW, there are some tips here regarding conversions like this, including using Time Stretch versus conforming to a frame rate in footage interpretation, depending on what you want to do with the audio (preserve pitch versus preserve synch).

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