Tilt-shift frame rate

mattsmith321

Newbie Location: Austin, TX Joined: Aug 30, 2013 09:30 Messages: 14 Offline

Solved by

Dec 06, 2013 15:57

Hi everyone!

I am playing around with the new tilt-shift effect in PD12. Very cool! Here is my first sample: Corsairs tilt-shift test video.

My approach was:
- Speed up the clip 2.6x
- Increase saturation to 200
- Used tilt-shift keyframes to follow the motion a little better

However, the article CREATING THE TILT-SHIFT LOOK IN POST (for Adobe After Effects) also mentions changing the frame rate: "Select the footage and in the menu bar go to Layer>Time>Time Stretch, then in the pop-up window enter 50 percent for the Stretch Factor. This will speed up the footage to playback at twice its normal speed, cutting its duration in half. In the timeline, adjust the work area to cover only the new duration of the clip. Select the clip and in the menu go to Effects>Time>Posterize Time. In the Effect Controls panel adjust the Frame Rate in the Posterize Time effect to four frames per second. The playback of the clip should appear to be sped up and stuttering, as if it were a series of still images brought to life."

Is there a way to change the frame rate in PD12 similar to what is mentioned in the article? I think my test clip looks pretty good given the amount of time spent and clip not being ideal for tilt-shift, but it seems a little too fast and is missing the time-lapse feel.

Thanks,
Matt YouTube channel

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Dec 07, 2013 19:53

Hi Matt -

It's missing the time-lapse feel because all the frames are intact.

I'm not an AE user, but I can see what the "Posterize Time" effect does. It effectively leaves out some frames & holds others... creating the stop animation effect.

This guy explains it pretty well https://vimeo.com/44574403# (though I wouldn't have used the word "interpretating")

There is no way to instantly do that in PD - you'd need to manually remove frames (say 12345678910 etc) - then create the animation by using snapshots of each frame. For this you could use a video "decompiler" to extract separate frames.

Using every 5th frame (say), set to a duration of about 00:00:00:04, you could produce the video (plain stop motion) then apply the tilt-shift effect to the produced file.

The way I understand it, that's what "Posterize Time" is doing.

Cheers - Tony
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ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Dec 07, 2013 22:28

Matt -

Here's a little example or two of what you get following the steps above...

Cheers - Tony

This message was edited 1 time. Last update was at Dec 07. 2013 22:29

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mattsmith321

Newbie Location: Austin, TX Joined: Aug 30, 2013 09:30 Messages: 14 Offline

Dec 08, 2013 17:19

Quote: Here's a little example or two of what you get following the steps above...

Thanks Tony! What did you use to remove the frames? I found this VideoHelp thread Trying to make a time-lapse video (speeding up original footage): How? with people suggesting avisynth or virtualdub. I will give one of those a try to see how it comes out.

Thanks!
Matt YouTube channel

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Offline

Dec 09, 2013 01:48

Hi Matt -

I guess I must be showing my age/slowing brain cells or whatever it is. Even though I said I thought I understood it, reading the thread you linked, I'm more confused than before about how the software does it!

In processing the clip, I took the KI.S.S. approach and used some free software to extract every frame from the clip as separate images. It was Video Decompiler - http://sc-video-decompiler.software.informer.com/ - it may not be the best thing to use. I didn't do any comparison testing.

From the original ~8 second clip, it produced 247 still image frames. I just used every 5th frame to create a time lapse look. Just the same as taking a snapshot of every 5th frame, only quicker!

Cheers - Tony


Filename	Frames.png	Download
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Downloaded:	566 time(s)

This message was edited 1 time. Last update was at Dec 09. 2013 01:50

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Dafydd B

Senior Contributor Joined: Aug 26, 2006 08:20 Messages: 11973 Offline

Dec 09, 2013 03:24

An interesting read. There are quite a few free decompilers around to choose from.
Dafydd