Slo Mo problem

jmo wrote on 3/11/2004, 7:10 AM
When I strech my clip (using the CTRL drag method), the clip goes to Slow motion no problem.

However, it doesn't look great when I play it back on the PC, and even when I render to DVD it is not looking that smooth.

Any tips, do I need to render in BEST quality (was using good). What about de-interlacing, is this required?

Any tips to improve the smoothness of it would help me greatly.

Comments

Randy Brown wrote on 3/11/2004, 7:23 AM
Lots of discussion on this here, you should do a search, but suffice it to say (with my experience at least) you'll have to choose between not smooth and blurry).
Randy
GaryKleiner wrote on 3/11/2004, 8:28 AM
What happens when you render it with Supersampling?

Gary
jmo wrote on 3/11/2004, 8:31 AM

That "Smart Sample" on by default, I didn't change it. Should I "Force Resample" ?

Is Supersampling something else, I'm fairly new to Vegas, haven't seen this.
johnmeyer wrote on 3/11/2004, 8:48 AM
Here's a thread that discusses settings:

Slow Motion Settings
jmo wrote on 3/11/2004, 9:06 AM

Great Thread, thanks very much, I will try this.
cervama wrote on 3/11/2004, 9:08 AM
I always use the default and have no problems. What kind of system are u running?
jmo wrote on 3/11/2004, 9:11 AM

Does the Shutter speed of the camera affect the ability to get better slo mo, if the shutter speed was raised to 100 for example?
johnmeyer wrote on 3/11/2004, 9:53 AM
Does the Shutter speed of the camera affect the ability to get better slo mo, if the shutter speed was raised to 100 for example?

That is a really great question. I'd love to hear an answer from someone that really knows. I think in general, for things like sports video, it would probably be a good thing to use the higher shutter speed, assuming that you have sufficient light. I say this without any actual experience. However, my belief is based on the idea that the higher shutter speed will result in sharper video. Since the extra video frames that get created in order to create the slow motion will be created from "crossfading" adjacent frames, it would seem that the sharper the images you start with, the sharper the overall video will be. However, it is also possible that you might end up with a really sharp frame, followed by one or more "crossfaded" blurry frames, and you'd end up with the video bouncing back and forth between sharp and blurry frames. You'll just have to try it and see how it looks.

I still wish that Sony (or someone that would make a Vegas plugin) would pick up on the Dynapel MotionPerfect idea. That product actually uses the same motion estimation algorithms used in MPEG to predict what the missing frames should look like. Since motion estimation obviously works incredibly well (DVD and satellite TV sure look good), this technology should be able to produce some amazing slow motion. Indeed, under the right circumstances, the MotionPerfect program produces amazing results, especially with progressive source material. Unfortunately, it doesn’t work all the time, and Dynapel hasn't significantly upgraded this product (or Steadyhand) for many years.

Note to Sony

There is LOTS of interest in better slow motion (it is one of the most frequent topics on this board). I wouldn't blame Sony if they don't pursue it in Vegas, but I sure hope they work harder to court third-party developers, and encourage one or more of them to develop slow motion plug-ins.
GaryKleiner wrote on 3/11/2004, 9:54 AM
>Does the Shutter speed of the camera affect the ability to get better slo mo, if the shutter speed was raised to 100 for example?<

That would make it look even choppier.
In video, there is no actual "shutter speed". What happens is that, with higher shutter speeds, a shorter slice of time gets recorded for each frame. This makes for less blur for each frame, e.g analysing a golf swing. The overall effect is more of a stuttery or shimery effect that would be even more pronounced in slo-mo.

Gary
AlistairLock wrote on 3/11/2004, 2:33 PM
"Does the Shutter speed of the camera affect the ability to get better slo mo, if the shutter speed was raised to 100 for example?"

Just recently I took my camera down to the beach to get various sequences of the tide coming in. It was a very bright sunny day, and so the shutter speed on the camera was very fast.

I wanted to slow the footage down to 50%. I did so using the playback rate setting, and was impressed by how sharp the picture remained, and how smooth the motion was. It didn't have a "slowed down video" look.
I'm assuming that, because each frame is composed of two fields, when slowed down, you're getting 25 fields a second instead of 50, and so get a smooth playback image, each field being displayed now for the time two would be displayed. Does that make sense, or am I just guessing?

Alistair
Randy Brown wrote on 3/11/2004, 5:11 PM
>>"What happens when you render it with Supersampling?"<<
I hate to sound so negative Gary, but for me (shooting a sporting event on a Canon XL1s) absolutely nothing (still a very noticeable blur using the suggested settings mentioned in the threads here).
Randy