◄ ––––•(-•For All•-)•–––– ►: Painting with light / Mit Licht malen

0:02 – 0:04

hello, my name is lars from postproduct
0:04 – 0:08

and today i got a project where we will be painting with light.
0:08 – 0:12

here we have daniel (trainee at lucidmedia)
0:12 – 0:14

and daniel was so kind to get in front of the camera
0:14 – 0:17

using his arm respectively his forefinger
0:17 – 0:23

to make some moves. we´ve been using these moves to attach a particle emitter to his finger.
0:23 – 0:31

so we had to motiontrack his fingertip and this is the result.
0:31 – 0:36

the particle emitter starts and we´ve also used an additional lens flare at the exact same point
0:36 – 0:43

and finally we used a bit of a certain look.
0:43 – 0:49

ok. let´s have a look at the footage. I´m closing the project
0:49 – 0:54

and create a new one. here we have the video of daniel
0:54 – 1:04

fullHD 24 frames per second .. and we use it to make a new composition.
1:04 – 1:08

I´ll adjust it to 100% scale and set it to "automatic" ..
1:08 – 1:17

ok - although we used molleton we can see some gaffa tape.
1:17 – 1:31

let´s fix this first by creating a vignette .. so I create a solid with a dark blue .. nearly black ..
1:31 – 1:40

using the comp size and name it "vignette".
1:40 – 1:49

I choose the ellipse mask tool and by double clicking it automatically creates
1:49 – 1:54

an elliptical mask and we will invert this mask,
1:54 – 2:00

feather it about 150 pixels and transform it a little bit by double clicking
2:00 – 2:06

on the mask shape. some chrushing by holding the CTRL-key
2:06 – 2:11

and some vertical stretching ..
2:11 – 2:19

the color of the solid does not match well so I´ll jump into the solid properties
2:19 – 2:23

using CTRL+Shift+Y
2:23 – 2:30

and darken it a bit.
Not Synced

so the next step is the tracking of daniel´s fingertip (I zoom in a litlle bit closer)..
Not Synced

and there are some things to consider - which we have forgotten to follow when filming -
Not Synced

for example: we do have quite a strong motion blur
Not Synced

which will make it hard for after effects motion tracker
Not Synced

to stick to exactly this point
Not Synced

we could have attached a special tracking point to his fingertip
Not Synced

but this would also have been problematic because we sometimes see the finger
Not Synced

from the top and sometimes from the bottom ...
Not Synced

ok - let´s jump into the tracking by double clicking on the video layer
Not Synced

and we do have the tracker activated - otherwise choose window->tracker
Not Synced

and we want to track the motion....
Not Synced

so we drag the tracker and choose this part of the image.
Not Synced

oops - no - first we go back to the beginning of the video
Not Synced

I´ll make the image a bit bigger as we do not see the other panels
Not Synced

and now we drag the tracking point to his fingertip.
Not Synced

the inner square represents the image sample the tracker will be searching for
Not Synced

and the outer square represents the search area where the tracker will search
Not Synced

for the inner square (when going to the next frames)
Not Synced

we do only have to check on "position" as this is the only data we need afterwards
Not Synced

and we can now start the tracking
Not Synced

there´s the first frame that is messing with our tracking
Not Synced

now comes the boring part (which I will speed up later)
Not Synced

and that is manually position the tracking points
Not Synced

here we have a good example of the too high motionblur
Not Synced

and we see that the search area is too small cause the finger is moving too much
Not Synced

in between the frames.
Not Synced

so I´ll do this manually for the hole sequence
Not Synced

while speeding up the screencast...
Not Synced

so far we´ve successfully tracked the fingertip
Not Synced

we don´t need the tracking data of this last second because
Not Synced

until then we will stop the emitter from shooting light particles
Not Synced

let´s create a null object in order to apply our x/y-position data to it
Not Synced

new--> null object
Not Synced

let´s quickly rename it to "coordinates"
Not Synced

in the tracker menu we choose this null-layer "coordinates" as the target
Not Synced

our tracking data should apply to
Not Synced

(yeah - i know - I still call it tracking data although I did most of it manually ..)
Not Synced

when applying a menu pops up and we click OK
Not Synced

back in the composition we now see our null object
Not Synced

that´s exactly following the fingertip
Not Synced

null objects generally appear as such a square
Not Synced

and that´s due to the size of this "coordinates"-layer
Not Synced

if we use CTRL+SHIFT+Y to jump into it´s properties
Not Synced

we could adjust it to 1px 1px
Not Synced

because it´s size isn´t relevant for our desired output
Not Synced

and by doing this we only have a little dot at the fingertip.
Not Synced

that just depends on the type of project you´re working on
Not Synced

if you want to have a large square NULL for your orientation or rather a tiny dot.
Not Synced

next we finally create the layer for our particular-effect
Not Synced

by creating a new solid with the name "particular" using comp size dimensions ..
Not Synced

.. choosing black as color ..
Not Synced

and we apply the effect by clicking
Not Synced

"effect" --> "trapcode" --> "particular"
Not Synced

I´m just making the effects panel a bit bigger
Not Synced

and adjust the size to "up to 100%" with automatic resolution
Not Synced

we see the emitter shooting particles but we want to
Not Synced

attach it to the fingertip.
Not Synced

so at the position´s x/y data we click the stopwatch holding the "ALT" key
Not Synced

and use the pickwhip to pin it to the tracking layer position data.
Not Synced

(pressing P on the "coordinates"-layer reveal the position properties)
Not Synced

and we confirm this pick by hitting Enter.
Not Synced

we can now see the emitter following the fingertip.
Not Synced

since the emitter should not start until the finger is lifted up
Not Synced

to an imaginary starting position
Not Synced

we´ll have to adjust this by animating the "particles per second".

◄ ––––•(-•For All•-)•–––– ►

Sunday, June 9, 2013

Painting with light / Mit Licht malen - Trapcode Particular Tutorial [eng sub]

No comments:

Post a Comment