AC160 slow motion
- Thread starter bigmajik
- Start date
AevnsGrandpa
Active member
I would say you put it on a timeline (project) meant for what you video at and then just use the NLE's time effects to create the slow motion. Putting it on a timeline with a different frame rate will not create a slow mo effect.
Jeff
Jeff
Is the whole wedding shot in 720/60p, and you just want a few clips in slo-mo? If so, for the clips that you want to play back in slo-mo, maybe you could put them on a separate 720/24p timeline, edit them to your liking and output as a H.264 file. Then drop that H.264 file in the time line of the wedding, wherever you want it. Or just try adjusting clip speed on the timeline.
Now I am not a wedding guy, I do events so I am not sure that this would be the most efficient way....but it would work.
Now I am not a wedding guy, I do events so I am not sure that this would be the most efficient way....but it would work.
It depends on the NLE. In Premiere it will not slow down -- you just set the clip speed to a percentage of the original. If the footage is recorded in 60p, it's much smoother than, say, slowing down 24p.
Michael Carter
Veteran
The idea of overcranking (shooting a higher frame rate) for slow motion is to give you discreet frames at the slower speed. Shooting 60p and conforming it to 24p simply tells the NLE to render each frame at the slower rate. There's no frame blending or (ala twixtor) synthesizing new frames to match the desired rate. Many NLEs will not give you that glassy-smooth look when you re-time the footage - you want each frame to be displayed, just with a different time base.
If you don't conform the footage but still want the cleanest slow motion, the new frame rate in your NLE needs to be mathematically correct - 60p footage on a 24p timeline would be 40% speed - this lets each 60p frame "land" on a 24p frame. But your whole project should be 24p in that case, if you have clips that need to appear "real time", have dialogue or captured sound that needs to be in the edit, etc.
For me, that means shooting a 24p project at 24p, and shooting slowmo at a higher frame rate. I slate those clips (if I'm doing a bunch, I shoot a clip of a board marked "60P", shoot my scenes, and then shoot a clip of the "60p" board upside down. For FCP and Cinema Tools, it's best to import 60p footage with specific project settings, so at a glance I can import and conform specific frame rates.
If you shoot an entire project at 60p, but only want a few clips to be slow motion, I don't know the best solution. I'd probably test rendering all my real-time footage out at 24 (or 30)p (which is throwing away data rather than synthesizing it) and conform the slowmo down to 24p.
My assumption is you'll get the smoothest slow motion by planning ahead, and shooting slowmo specifically at a higher rate.
If you don't conform the footage but still want the cleanest slow motion, the new frame rate in your NLE needs to be mathematically correct - 60p footage on a 24p timeline would be 40% speed - this lets each 60p frame "land" on a 24p frame. But your whole project should be 24p in that case, if you have clips that need to appear "real time", have dialogue or captured sound that needs to be in the edit, etc.
For me, that means shooting a 24p project at 24p, and shooting slowmo at a higher frame rate. I slate those clips (if I'm doing a bunch, I shoot a clip of a board marked "60P", shoot my scenes, and then shoot a clip of the "60p" board upside down. For FCP and Cinema Tools, it's best to import 60p footage with specific project settings, so at a glance I can import and conform specific frame rates.
If you shoot an entire project at 60p, but only want a few clips to be slow motion, I don't know the best solution. I'd probably test rendering all my real-time footage out at 24 (or 30)p (which is throwing away data rather than synthesizing it) and conform the slowmo down to 24p.
My assumption is you'll get the smoothest slow motion by planning ahead, and shooting slowmo specifically at a higher rate.
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I agree with Jeff. Always set your project at the frame rate shot. Then slow down the particular clip in your edit package- The higher frame rate just allows you to slow the action more before you descend into stuttervision- I use Edius and do this often- looks fine..
tflak
Veteran
I don't have a lot of experience in this area so am picking up some good info here. Feedback on my post in another thread would be appreciated:
http://www.dvxuser.com/V6/showthrea...ssions&p=1986186192&viewfull=1#post1986186192
The first shot (jib) was 60p just dropped into a 24p timeline in FCPX. It was not conformed, but looks perfectly smooth to me. I guess a lot depends on your NLE and the subject matter. This footage is just stuff I was messing around with and so is pretty boring, but may show some things about 60p in a 24p timeline.
I used to shoot with a GH1 using 720p 60 at 1/125 then conform the clips using Cinema Tools to get silky smooth slo-mo. Then I got an AF100 and would overcrank using VFR. But this had its limitations for the reasons explained in my post above. So I was anxious to experiment with the 160A.
http://www.dvxuser.com/V6/showthrea...ssions&p=1986186192&viewfull=1#post1986186192
The first shot (jib) was 60p just dropped into a 24p timeline in FCPX. It was not conformed, but looks perfectly smooth to me. I guess a lot depends on your NLE and the subject matter. This footage is just stuff I was messing around with and so is pretty boring, but may show some things about 60p in a 24p timeline.
I used to shoot with a GH1 using 720p 60 at 1/125 then conform the clips using Cinema Tools to get silky smooth slo-mo. Then I got an AF100 and would overcrank using VFR. But this had its limitations for the reasons explained in my post above. So I was anxious to experiment with the 160A.