This shows that you need different settings for different slow motion speeds and that certain footage cannot be slowed down to 1/8th normal speed.

So that I didn't get any motion blur, I set the shutter speed to 1/500th.

The sample footage is made up of two shots.

1. Original footage (which was shot 1080i) - scaled down for Vimeo to 720p

2. Final Cut Pro 1/2 speed version: ['Speed...' from the Modify menu] This throws away one field for each frame and creates new frames by blending existing ones.

3. Compressor 1/2 speed frame blended version: Takes each field and deinterlaces to produce a frame.

4. Compressor 1/4 speed motion compensated version: Looks at each frame to see in which direction groups of pixels are moving - creates new frames based on these guesses.

5. Compressor 1/4 speed high quality motion compensated version: As before, but spending more time analysing the pixels in each frame.

6. Compressor 1/8 speed high quality motion compensated version: As before, but slower. This shows that 1/8th speed doesn't work with this kind of footage, but it does 'go wrong' in an interesting way.

Credits

54 Likes

  • assbach plus 2 years ago
    very interesting, thanks for the experiment.
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  • James 2 years ago
    great test man. you've proven it's definitely better for PAL slo mo. it's a shame I'm on NTSC - 60i to 24p doesn't look nearly as good.
    you would know anything that would smooth out the jagged motion of the missing frames would you?

    cheers
  • James 2 years ago
    Slow Motion in 24p Filmmaking by Thomas Worth
    rarevision.com/v1/articles/slow_motion.php#
    *HIGHLY RECOMMENDED
  • Peter Quiambao Jr. 1 year ago
    Really informative article, but, correct me if I'm wrong, the HV20 can't record in 60i right? So, we're sort of back to square one then.
  • Alex Gollner plus 1 year ago
    The HV20/30 can record interlaced at 50i (PAL) and 60i (NTSC)
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  • toolance 2 years ago
    Sorry for being thick here but, was this shot in colour then just converted to B&W during editing?
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  • Alex Gollner plus 2 years ago
    Yes.
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  • melado 1 year ago
    Wow. Last part is hypnotizing.
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  • Copenhagen 1 year ago
    Interesting - thx for the test. But is there any conclusion?
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  • Andy Yoong plus 9 months ago
    Did the motion compensated versions take an age to render?
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  • Alex Gollner plus 9 months ago
    I suppose so, my sample clip was so short, and I didn't keep a record of render times.
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  • Jesse Dean 9 months ago
    Where is the change in duration speed taking place? Are you using FCP or Compressor to slow down the clip?
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