Slow motion at DVinfo.net

Chad Dyle · July 29th, 2008, 07:27 PM

I'm editing some wedding stuff in FCP and I've noticed that when I slow a clip down to 75% or 50%, I usually get a stuttering effect. Is there a way around this? I'm coming over from Vegas where I never noticed that before. I was always told to try to slow things down by a quarter or third, but thats about it.
Any thoughts?

Kevin Walsh · July 29th, 2008, 07:55 PM

There are a number of things that can cause this, the first thing I would do is check and see if you need to render the timeline. To render hit (option R).
If you do a lot of slow-mo you may want to consider using the optical flow feature in Motion or even better Twixtor.

Chris Harris · July 29th, 2008, 09:13 PM

Also, if you're doing slow motion on 24p footage, it's not going to look anywhere near as smooth as slow motion on 60i footage.

Chad Dyle · July 29th, 2008, 09:28 PM

I'm pretty sure all of the footage is 60i. I'm going to take a look at Twixtor as well.
Thanks!

Robert Lane · July 30th, 2008, 12:24 AM

In order to get really good-looking slo-mo in post on FCP you need to use the Optical Flow retiming which is ported over from Motion. Twixtor is much easier to use and I think has a better final output but the full motion-control suite is almost the cost of FCS2, so be prepared.

Victor Kellar · July 30th, 2008, 11:31 AM

When using FCP's native speed control panel make sure that Frame Blending is selected, this should help

William Hohauser · July 30th, 2008, 01:47 PM

Quote:

Originally Posted by Chad Dyle

I'm editing some wedding stuff in FCP and I've noticed that when I slow a clip down to 75% or 50%, I usually get a stuttering effect. Is there a way around this? I'm coming over from Vegas where I never noticed that before. I was always told to try to slow things down by a quarter or third, but thats about it.
Any thoughts?

What sort of stuttering? I slow footage done all the time and never get what I would classify as a stutter. The only stutter I can imagine is if the field order was somehow reversed. What format are you shooting and editing in?

Chad Dyle · July 30th, 2008, 02:05 PM

We are shooting in HDV and editing in ProRes. I'll see if I can upload some clips later.

Marc Colemont · July 30th, 2008, 10:38 PM

I have the same with 50P footage which I want to slow down to 50% in a 25P project.
In Premiere Pro it would do this flawlessly, but the result in FCP is not satisfying at the moment. It is very stuttery after exporting, while the frames doesn't need to do any frame blending at all. As the imported file has double the amount of frames available.
In Adobe Premiere Pro it's called 'Interpret footage'. Is there something similar available in FCP?

Andy Mees · July 31st, 2008, 12:25 AM

in FCP you would use Cinema Tools to conform the frame rate
see this thread at the COW http://forums.creativecow.net/readpost/8/936223

July 29th, 2008, 07:27 PM	#1
Chad Dyle Major Player Join Date: Jun 2007 Location: New Orleans, LA Posts: 410	Slow motion I'm editing some wedding stuff in FCP and I've noticed that when I slow a clip down to 75% or 50%, I usually get a stuttering effect. Is there a way around this? I'm coming over from Vegas where I never noticed that before. I was always told to try to slow things down by a quarter or third, but thats about it. Any thoughts? __________________ www.chaddyle.com www.chaddyleproductions.com

July 29th, 2008, 09:28 PM	#4
Chad Dyle Major Player Join Date: Jun 2007 Location: New Orleans, LA Posts: 410	I'm pretty sure all of the footage is 60i. I'm going to take a look at Twixtor as well. Thanks! __________________ www.chaddyle.com www.chaddyleproductions.com

July 30th, 2008, 02:05 PM	#8
Chad Dyle Major Player Join Date: Jun 2007 Location: New Orleans, LA Posts: 410	We are shooting in HDV and editing in ProRes. I'll see if I can upload some clips later. __________________ www.chaddyle.com www.chaddyleproductions.com

July 30th, 2008, 10:38 PM	#9
Marc Colemont Major Player Join Date: Nov 2005 Location: Belgium Posts: 695	I have the same with 50P footage which I want to slow down to 50% in a 25P project. In Premiere Pro it would do this flawlessly, but the result in FCP is not satisfying at the moment. It is very stuttery after exporting, while the frames doesn't need to do any frame blending at all. As the imported file has double the amount of frames available. In Adobe Premiere Pro it's called 'Interpret footage'. Is there something similar available in FCP? __________________ Marc Colemont - Belgium - http://www.mc-productions.be JVC GY-HM850's, HM890, HM600

July 29th, 2008, 07:55 PM	#2
Kevin Walsh Major Player Join Date: Feb 2008 Location: Phoenixville, PA Posts: 225	There are a number of things that can cause this, the first thing I would do is check and see if you need to render the timeline. To render hit (option R). If you do a lot of slow-mo you may want to consider using the optical flow feature in Motion or even better Twixtor.

July 29th, 2008, 09:13 PM	#3
Chris Harris Major Player Join Date: Mar 2006 Location: San Francisco, California Posts: 487	Also, if you're doing slow motion on 24p footage, it's not going to look anywhere near as smooth as slow motion on 60i footage.

July 30th, 2008, 12:24 AM	#5
Robert Lane Go Go Godzilla Join Date: Nov 2004 Location: Scottsdale, AZ USA Posts: 2,823 Images: 15	In order to get really good-looking slo-mo in post on FCP you need to use the Optical Flow retiming which is ported over from Motion. Twixtor is much easier to use and I think has a better final output but the full motion-control suite is almost the cost of FCS2, so be prepared.

July 30th, 2008, 11:31 AM	#6
Victor Kellar Major Player Join Date: Feb 2007 Location: Toronto Ontario Canada Posts: 239	When using FCP's native speed control panel make sure that Frame Blending is selected, this should help

July 31st, 2008, 12:25 AM	#10
Andy Mees Major Player Join Date: Mar 2006 Location: Kuala Lumpur, Malaysia Posts: 645	in FCP you would use Cinema Tools to conform the frame rate see this thread at the COW http://forums.creativecow.net/readpost/8/936223