Any idea how this was made ?
http://www.youtube.com/watch?v=I2MsDogV4g4&feature=related
Maybe they shot a video of her doing her piourettes. Then they divided the videoscreen into horicontal onepixel lines and switched those lines with the corresbonding lines of one of the following frames. Than you work your way up from her feet to her head keeping a constant offset for each line in each frame and I think you will get something similiar to the first shot in the video. By using somekind of function for the offsets as a function of the position of the line you can get all kind of effects
I don’t know, If theres a flaw in my assumption, but maybe it would work…
I think he is driving the time offsets on pixel basis with animated textures/alphas.
i’ve seen that somewhere else, is like some AE plugin or something. but yea it’s pixelrow from diffrent frames. she’s is turning.
gradient on horizontal or vertical rows, that set the frame offset, and even a tweaked gradient where you see the feets many times, ok.
In AE there is a filter called “Time Displacement” where you can use a greyscale image to map time offset values. You can achieve that kind of effect with that filter, though you’d want her to move pretty slow to get enough “time samples” in order for the distortion to be nice and smooth.
haha thats pretty much what is happening with jello cam on the new HD DSLRs. They read out a line at a time instead of a frame, so you get weird effects from high speed motion. Check out aeroplane propelers from Iphones. Anyway yea just delay line readouts on a grayscale.
@3Point
is it that bad with HD DSLRs? I didn’t know it was that bad. there’s several videos taken on prop planes with iPhone4/3Gs where you see this effect.
No this is exagerated, but the principal is the same. You could get this effect in a hdslr if you could spin the girl fast enough (like a propeler).
you could do that sort of effect with the warp plugin in the vse of 2.49 set up for horizontal displacement only. Of course it would take quit a bit of compositing and masking to get the results that they did. I did something similar but much, much simpler in the title screen to this video. Starting at 2:24 you can see where I used the warp plugin in 2 different strips in the vse.
It reminds me of an effect we use to get in old dos games. It was call screen sheer. It was caused by filling the video buffer when it was in the middle of a refreash. So the top of the screen was from the old frame, and the bottom of the screen was from the new frame. The correct way to do it was to test for when the last vertical sync was complete, then fill the video buffer.
aljo