2012年10月24日星期三

use After Effects to slow down the action Canon T2i 60 fps Slow Motion

use After Effects to slow down the action Canon T2i 60 fps Slow Motion

use After Effects to slow down the action Canon T2i 60 fps Slow Motion
To get the "super slow motion", after I filmed at 60fps, I through it into the program "After Effects". I used an effect that comes with the program called "Time Warp". This allowed me to make the 60fps, to 1000fps. The way this works is the computer processes/adds frames in between the frames that are already in existence. It took several days for the computer to process the clips into the super slow motion that appears as well, so it does take a lot out of the computer, as far as processing goes. Another similar program that does something similar to this slow motion effect, is a program called "Twixtor". It's another great program that is very similar, however you have to buy it as a separate plugin, and it is a little expensive, but if you do a lot of slow motion, it's totally worth it :)
The concept and the acting was cheesy and silly, but creating this video was 100% pure fun.
I decided to shoot the whole sequence in a 720P 60 fps mode, with the intent of slowing some parts down for true slow motion in the 24 fps edit line. I was a little concerned about the lack of sharpness compared to 1080p, but GH2 holds up very well — much better than T2i.
I inserted "Bill + Kathy" (dropzone and the airplane owners) at 00:13 in After Effects, for a little gag the locals might appreciate. Motion tracking with Mocha worked well, as usual. Photoshopped decal slipped a little during tracking, but you really had to look frame by frame.
I forgot about the 180 shuttle rule at 00:46, shooting it in 1/50 by accident instead of 1/125, resulting in undesirable motion artifact for some indoor shots. Freefall footage, however, shot in 1/200 shuttle speed, looked pretty good in slow motion, with the footage conformed from 60 to 24 fps.
For color grading, Magic Bullet Mojo was used for ground footage. It turned out a little dark, so lightened it a little using Colorista. For skydiving footage, Colorista was used, bringing up the shadows and giving a slight greenish tint. I added a little yellow to the midrange and a bit of red to lightend hilights.
As I use the GH2 more, I really could use for shallow DOF. I need to get a faster lens. For technical aspect of achieving slow motion
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