Slo-motion-regular speed, matrix style with premiere

[kojiro]

Hi, what I'm trying to do is edit my fight scene using slo-motion effects. I want the kick to be in slo-motion and then when I hit the guy it goes back to regular motion. I have tried to do it by using the razor to cut the one move I want, then I would change speed of that cut. But the results are very skippy/jumpy video and not a smooth transition between the speeds. Is there another way to do this and make it look really good? Thanks

[tgpo]

Are you on PC or Mac?

[housepig]

the reason it's jumpy is that in slowing down the frame rate... damn, it's harder to explain than I thought.

Lets say you have 10 frames (1/3 of a second of video).

You want those 10 frames to stretch out for 2 seconds (60 frames).

So your software is duplicating frame 1 6 times, frame 2 6 times, etc.

Films like the Matrix (or any film that uses slow-motion stuff) is actually cranking up the frame rate of thier film - instead of 30fps, they will shoot at 90fps or 120fps, so they can slow down the film by a factor of 3 or 4 and retain smooth motion.

There is a piece of software called ReTimer, from RealViz, it will take your 10 frame segment and instead of just duplicating frame 1 6 times, it will insert 6 morphing frames between frames 1 and 2, then 6 morphing frames between 2 and 3, etc. etc. - so you have the illusion of continuous motion.

But it's pretty expensive - the last time I checked it out, it was over $1,000 easily...

[hitechjunkie]

here's a clip i did awhile ago of my son jumping a ramp. lacking the processor speed (athlon K-6 350mhz) to run Premiere, not to mention the $$$, i took the poor mans route and used Virtualdub and frameserved to Tmpgenc.

[housepig]

hitechjunkie -

can you give us a little more detail on how you did it?

[BJ_M]

very easy in vegas -- maybe this tutorial will help you if you want to use adobe

http://www.creativecow.net/articles/kumar_satish/vegas_morph/index.htm

above is for creating bullet-time effects in vegas


in vegas you use velocity envolopes for speed effects and supersampling -- excellent results

i suspect some of the same methods can apply

[hitechjunkie]

hitechjunkie -

can you give us a little more detail on how you did it?

it's been about 2 years since i've done it and i did post it here back then but i'm sure that post is long gone. what i essentially did was:

1) captured the video to my PC, 30fps, 352x480, 2 interlaced fields per frame
2) loaded the AVI into VDub, with "each field a frame, double framerate" option (now 60fps framerate, 352x240 rez)
3) added the "field shift" filter to smooth out playback
4) frameserved to TMPGEnc, first part at 60fps framerate, second part at 15fps framerate (maybe even 10fps)

crude, but effective...