
60i to 24p slow motion
2 years ago
Video shot at 60i, 1/120th shutter speed, slowed down to half speed progressive footage in a 24p timeline with After Effects.
hv20.com/showthread.php?p=47024#post47024 for instructions.
Music by Kraftwerk.
hv20.com/showthread.php?p=47024#post47024 for instructions.
Music by Kraftwerk.
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I'm really not sure what that issue could be! I haven't really spent much time in FCP, I work in Premiere / After Effects.
It may be possible that by applying the fade it caused FCP to look at the interlaced lines differently, and pass along progressive frames to the slowing-down business, but this is just a completely wild guess. Sorry!
thanks!
My thoughts are that either your shutter speed was something faster than 1/120 which would produce a bit of a stroboscopic jaggy motion, just light a faster shutter speed with regular motion video, OR
By slowing the video down to 50 percent you are generating 30fps slowed video, right? Well, when you put that in a 24fps comp then after effects has to some trickery to make it work. That trickery is probably dropping some frames... I'm not sure!
Try taking some regular 30fps video and putting it in a 24fps comp. Does it show the same jagged motion?
PS- you said, "just light a faster shutter speed with regular motion video" do you mean shoot on a higher shutter speed then 1/120 and do the same conversion you have in your stepbystep?
Just LIKE a regular speed video with a faster than 180-degree shutter speed [anything above 1/48th for 24fps video or 1/60th for 30fps video].
The faster the shutter speed the less natural motion blur is seen in the frames so the motion appears less fluid.
what are your thoughts on 30p compared to 24p? big enough difference in the "film look" quality to make 24p worth it I assume? *I haven't had a chance to do this test myself, but wondering what your thoughts are on this.
cheers!
Just to double check, are you doing your slow motion in after effects?
HALLELUYA!!
I tried it and it looks a 'little' choppy.
a little beside the point, but i really liked the dissolve at the end. was that just a standard dissolve? because it looked more like a fade to black on film looks. with the highlights lingering a little bit.
rarevision.com/v1/articles/slow_motion.php
Yours looks good though
Could you tell me what Kraftwerk song this is? Thanks
Great instructions on that forum...
- import 60i (29.97 fps interlaced) video and adjust framerate to half (14.985) #slow it down by half
- add deinterlace filter and set to use yadif setting and (bob) double frame rate
Video is now standard 29.970 fps progressive
That separated fields and adaptive de-interlace them to not cause too much resolution loss
Now add interpolate filter and set it to quadrupal frame rate and use blend method
- adjust output framerate to decimate by 5 (choose every fifth frame)
Voila now you have 24p slow-motion video!
Here is sample:
vimeo.com/7498511