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Old August 26th, 2005, 03:51 PM   #1
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Straightforward slow-motion method

Hello. I have been reading a lot about doing smooth fluid slow-motion using the DVX100a. It makes perfect sense to me to shoot in 60i, then make each field a full frame to create 60p, then dropping the 60p footage into a 24fps and slowing it down to 40%.

However there seems to be no real tutorials on how to do this, or the information out there appears to be oversimplified with no real details, and no way to confirm that you have done the job properly at each step.

Assuming I have virtualdub, AVI synth, Premiere Pro, and After Effects, I have two preliminary questions:

1. How do I make the 60i footage I captured into 60p footage. How can I verify that I have done this properly?

2. After I do this, shouldn't my footage be "twice" as long in running time? Since I have converted 60 half-fields into 60 full fields, my ten second clip should have double the number of frames and therefore should be twenty seconds long. (I know that logic is flawed somehow, but I don't know why)


lets start there, and see what everyone out there can teach me! : )

(I hope this is the appropriate forum for this topic)
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Old August 31st, 2005, 11:01 AM   #2
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Thanks, I wasn't aware of this technique.

I dug up:


http://www.cinematography.com/forum2...php?t8136.html

http://rarevision.com/articles/slow_motion.php#
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Old September 1st, 2005, 10:11 AM   #3
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Tutorial on slow-motion

I think I got it down. Check my tutorial here:

http://www.dvinfo.net/conf/showthread.php?t=50375

(this is posted in another, probably more appropriate forum)
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Old September 1st, 2005, 11:46 AM   #4
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To keep your timing, you would need to convert your 60 interlaced fields to 30 frames. Doubling the fields on top of each other may not always produce the best looking footage. Sometimes, if the action in the frame is fast, it actually looks better to only use one field and double it to make a single frame.

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Old September 1st, 2005, 11:57 AM   #5
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Quote:
Originally Posted by Sean McHenry
To keep your timing, you would need to convert your 60 interlaced fields to 30 frames. Doubling the fields on top of each other may not always produce the best looking footage. Sometimes, if the action in the frame is fast, it actually looks better to only use one field and double it to make a single frame.
Well, then you get stuttery, jerky motion. I am trying to achieve fluid slow-motion using 60fps.
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