audio synching, sound keys, render issues


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audio synching, sound keys, render issues
by Daniel Potthast on Aug 13, 2008 at 1:03:06 pm

I am wrapping up a music video which makes heavy use of Trapcode Soundkeys with video very closely synchronized with audio. When I RAM preview everything is beautiful--- all video is perfectly in time with audio-- However, when I render this composition to Quicktime DV there is a slight difference-- very slight--- to timing of RAM preview--

I have considered that comp frame rate could be the issue as the original comp was in 30fps

rendering at either 29.97 fps or 30 fps makes no difference however-- the synch issue still exists...

Any ideas from the experts?

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Re: audio synching, sound keys, render issues
by Dave LaRonde on Aug 13, 2008 at 9:01:27 pm

What happens if you render this comp using Quicktime's Animation codec, then render in your editing application as necessary?

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

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Re: audio synching, sound keys, render issues
by Daniel Potthast on Aug 14, 2008 at 1:51:24 pm

Yep, that did it---
no shift in timing and once converted to DV, timing is still good...

Would it be safe to say then that, as a general rule, when timing is critical, render as Animation and then convert to another format?

Main issue here is obviously the animation output is close to 6GB in this case for a 5 min video.

any ideas why this shift happens in the first place? I have noticed a few other posts with similar issues using quicktime...

thanks for the help!

dp

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Re: audio synching, sound keys, render issues
by Dave LaRonde on Aug 14, 2008 at 5:49:35 pm

[Daniel Potthast] "no shift in timing and once converted to DV, timing is still good...
any ideas why this shift happens in the first place? I have noticed a few other posts with similar issues using quicktime... "

Y'know, I wish I had a clue. Personally, I suspect it has more to do with iTunes and consumer applications than anything else.

If Apple EVER gets back to dealing with professional media software, I'd hope they'd streamline the code for quicktime. Perhaps even Quicktime ProApps: it even sounds good for the marketing weasels.

I think quicktime's getting bogged down with garbage like movie rentals, iPods and iPhones.

i'd like to iKick Apple where the iSun doesn't iShine.

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

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