30p - 24p conform for music video at DVinfo.net

David Ells · April 19th, 2010, 10:51 PM

I shot a music video last night at 30p with the hopes of conforming in cinema tools to 24p. I moronically sped up the song to 120% instead of 125% and now I need to figure out how to proceed. The song stays relatively in sync for about 3 seconds so I could feasibly edit "as is" because there will be enough cuts, but this repetitive re-syncing will get somewhat tedious. My other options, as I see it, are to figure out a way to smoothly ramp up the video playback to ~104% (the ways I've tried it in FCP have resulted in somewhat jerky playback) or change the rate of the song. Changing the rate of the song is probably the last thing I want to do. I'd rather trudge through re-syncing than mess with the song's integrity.

Any other thoughts? Particularly in regards to getting smoother speed adjustments to 104%. My math skills are obviously deficient, and vocab like "pull-down" and "drop-frames" have always boggled my mind. I can post video if anyone would find this helpful.

edit: Exporting with After Effects has yielded the same jerky/catch-upy issues with 104% speed up. Again, I'm not sure if changing the footage interpretation might help at all, but that stuff really confuses me.

Here's an example of the issue: http://www.sendspace.com/file/02d8ke

Thanks!

David Ells · April 19th, 2010, 11:20 PM

Exporting with After Effects has yielded the same jerky/catch-upy issues with 104% speed up. Again, I'm not sure if changing the footage interpretation might help at all, but that stuff really confuses me.

Here's an example of the issue: Download AE test.mov from Sendspace.com - send big files the easy way

(Edit: sorry, can't seem to delete this post)

William Hohauser · April 20th, 2010, 07:22 PM

30p to 24p is very tricky. Most pros avoid doing it as there's no really good way to interpolate the frame rate and get smooth movement. Every fifth frame needs to be removed or mixed into the frame before and after. Doesn't look good. Whatever you do movement is changed. Video to film transfer houses hate it. Better to edit in 30p and conform the final product if it needs to be in 24.

David Ells · April 20th, 2010, 08:42 PM

Well it looks silky smooth to me when it's straight 30p to 24p conformed. The problem is just that I did the math wrong so the extra speed change introduces the jumpiness. And by conform I don't mean "change the frame rate," I mean "change the speed." it plays the footage slower and matches up to 24p. I know other pros do this for a semi-slo-mo effect. for example, this guy uses the exact approach i was attempting:

April 19th, 2010, 10:51 PM	#1
David Ells Regular Crew Join Date: Aug 2008 Location: Beverly, MA Posts: 87	30p - 24p conform for music video I shot a music video last night at 30p with the hopes of conforming in cinema tools to 24p. I moronically sped up the song to 120% instead of 125% and now I need to figure out how to proceed. The song stays relatively in sync for about 3 seconds so I could feasibly edit "as is" because there will be enough cuts, but this repetitive re-syncing will get somewhat tedious. My other options, as I see it, are to figure out a way to smoothly ramp up the video playback to ~104% (the ways I've tried it in FCP have resulted in somewhat jerky playback) or change the rate of the song. Changing the rate of the song is probably the last thing I want to do. I'd rather trudge through re-syncing than mess with the song's integrity. Any other thoughts? Particularly in regards to getting smoother speed adjustments to 104%. My math skills are obviously deficient, and vocab like "pull-down" and "drop-frames" have always boggled my mind. I can post video if anyone would find this helpful. edit: Exporting with After Effects has yielded the same jerky/catch-upy issues with 104% speed up. Again, I'm not sure if changing the footage interpretation might help at all, but that stuff really confuses me. Here's an example of the issue: http://www.sendspace.com/file/02d8ke Thanks! Last edited by David Ells; April 20th, 2010 at 01:16 PM. Reason: additional info

April 19th, 2010, 11:20 PM	#2
David Ells Regular Crew Join Date: Aug 2008 Location: Beverly, MA Posts: 87	Exporting with After Effects has yielded the same jerky/catch-upy issues with 104% speed up. Again, I'm not sure if changing the footage interpretation might help at all, but that stuff really confuses me. Here's an example of the issue: Download AE test.mov from Sendspace.com - send big files the easy way (Edit: sorry, can't seem to delete this post) Last edited by David Ells; April 20th, 2010 at 01:22 PM.

April 20th, 2010, 07:22 PM	#3
William Hohauser Inner Circle Join Date: Dec 2005 Location: New York City Posts: 2,650	30p to 24p is very tricky. Most pros avoid doing it as there's no really good way to interpolate the frame rate and get smooth movement. Every fifth frame needs to be removed or mixed into the frame before and after. Doesn't look good. Whatever you do movement is changed. Video to film transfer houses hate it. Better to edit in 30p and conform the final product if it needs to be in 24. __________________ William Hohauser - New York City Producer/Edit/Camera/Animation

April 20th, 2010, 08:42 PM	#4
David Ells Regular Crew Join Date: Aug 2008 Location: Beverly, MA Posts: 87	Well it looks silky smooth to me when it's straight 30p to 24p conformed. The problem is just that I did the math wrong so the extra speed change introduces the jumpiness. And by conform I don't mean "change the frame rate," I mean "change the speed." it plays the footage slower and matches up to 24p. I know other pros do this for a semi-slo-mo effect. for example, this guy uses the exact approach i was attempting: We.own.the.sky on Vimeo