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Design + Motion Portfolio of Sanjai Davé

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You are here: Home Archives for Motion

February 21, 2017 by Sanjai (0)

Premier Shortcuts

Alt + Drag = Copy clip

C = Razor tool

⌘ + K = Split Edit

Ripple Trim Next Edit to Playhead W

Ripple Trim Previous Edit to Playhead Q

Shift+K is a very powerful little shortcut that enables intizlies playback around the position of your playhead. In effect, when you engage the shortcut Premiere Pro will start playback a few seconds before the playhead and continue to play until a few seconds after the playhead position. This is incredibly useful for seeing if an effect works without having to reach over and grab the mouse or risk losing the position of your playhead.

“Play Around” in Premiere Pro is customizable, with the ability to set your preference for the duration of the pre and post roll. To modify, open your Adobe Premiere Pro preferences and click on the Playback section.

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You can use some shortcuts to playback faster than realtime without going so fast you can’t understand the dialog.

Hit play, with either Spacebar or L key to being playback. Double tap L for double speed.

Or Shift key down, tap L and keep tapping L until the playback speed is where you have optimal clarity and speed.

(Recall how many times you tapped).

If you go too far tap J to pull back a speed and also reverse the playback.

You could go the other way which may be more efficient:
Tap L twice to go into 2x speed. Which will most likely be too fast.
Hold Shift and tap J a couple times to pull down the speed.

K will stop the play head. Shift + K = Play a 3 seconds before and 1 second after the timeline position.

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“I did find “Apply video transition” or “Apply default video transition to Selection” but they don’t work, since I want to apply the video transition to single clips, not between two clips as normal.”

Ctrl+D.

Yes, if you apply it between two clips it will do a cross dissolve between two clips.
However, if you apply it to beginning/end of a clip that has no clips around it on the same video layer, it will do what you’re looking for.
So – select all the clips you want, drag them up to an empty video layer. target that layer (and ONLY that layer). swiftly use PgUp/PgDn/Ctrl+D to apply “cross dissolve fade in”/”cross dissolve fade out”.
If you want, you can drag the clips back to the original video layer after you finished.

OR : If you want fade in/fade out rather than cross dissolve for two consecutive clips , you can also change the default transition (Ctrl+D) to “dip to black”, then you can apply it between two clips on the same layer.

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Shift + ⌘ + / = Duplicate clip

March 16, 2015 by Sanjai (0)

After Effects Scripts

Inertial Bounce

Intertial Bounce
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// Inertial Bounce (moves settle into place after bouncing around a little)
 
n = 0;
 
if (numKeys > 0){
 
n = nearestKey(time).index;
if (key(n).time > time){
n--;
 
}
 
}
 
if (n == 0){
t = 0;
}else{
t = time - key(n).time;
 
}
 
 
if (n > 0){
v = velocityAtTime(key(n).time - thisComp.frameDuration/10);
amp = 0.1;
freq = 2.0;
decay = 7.0;
value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);
 
}else{
 
value;
 
}

Throw

Throw
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// Throw (move at a constant speed without keyframes)
veloc = -10; //horizontal velocity (pixels per second)
x = position[0] + (time - inPoint) *veloc;
y = position[1];
[x,y]

Rotation

Rotation
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// Spin (rotate at a constant speed without keyframes)
veloc = 360; //rotational velocity (degrees per second)
r = rotation + (time - inPoint) *veloc;
[r]

Wiggle in one direction

Wiggle only in x (horizontal)
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org=value; temp=wiggle (5,50); [temp[0],org[1]];
Shorthand:
 
[wiggle(5,50)[0],position[1]]
wiggle only in y (vertical):
 
org=value; temp=wiggle (5,50); [org[0],temp[1]];

Looping Wiggle
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freq = 1;
amp = 110;
loopTime = 3;
t = time % loopTime;
wiggle1 = wiggle(freq, amp, 1, 0.5, t);
wiggle2 = wiggle(freq, amp, 1, 0.5, t - loopTime);
linear(t, 0, loopTime, wiggle1, wiggle2)

Random Frame
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fr = 12; // frame rate;
numFrames = 8;
seedRandom(index,true);
seg = Math.floor(time*fr);
f = Math.floor(random(numFrames));
for (i = 0; i < seg; i++)
  f = (f + Math.floor(random(1,numFrames)))%numFrames;
framesToTime(f);

 

Loop Cycle not working?

Activate the collapse transformations (asterisk like symbol on the left of the layermodes) and this works for me in conjunction with time remap and the previously mentioned loopOut expression (loopOut(type = “cycle”, numKeyframes = 0)

My Top 5 After Effects Expressions

Color Conversion methods (expression reference)

Harry Frank provides a video tutorial on his graymachine website that shows how to use these color conversion methods to change the color of the waves produced by the Radio Waves effect.

rgbToHsl(rgbaArray)
Return type: Array [4].Argument type: rgbaArray is an Array [4].

Converts a color in RGBA space to HSLA space. The input is an Array of normalized red, green, blue, and alpha channel values, all in the range of 0.0 to 1.0. The resulting value is an Array of hue, saturation, lightness, and alpha channel values, also in the range of 0.0 to 1.0. Example:

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  rgbToHsl.effect("Change Color")("Color To Change")

hslToRgb(hslaArray)
Return type: Array [4].Argument type: hslaArray is an Array [4].

Converts a color in HSLA space to RGBA space. This conversion is the opposite of the conversion performed by the rgbToHsl method.

 

wiggle(freq, amp, octaves=1, amp_mult=.5, t=time)
Return type: Number or Array.Argument type: freq, amp, octaves, amp_mult, and t are Numbers.Randomly shakes (wiggles) the value of the property.freq value is the frequency in wiggles per second.amp value is the amplitude in units of the property to which it is applied.octaves is the number of octaves of noise to add together. This value controls how much detail is in the wiggle. Make this value higher than the default of 1 to include higher frequencies or lower to include amplitude harmonics in the wiggle.amp_mult is the amount that amp is multiplied by for each octave. This value controls how fast the harmonics drop off. The default is 0.5; make it closer to 1 to have the harmonics added at the same amplitude as the base frequency, or closer to 0 to add in less detail.t is the base start time. This value defaults to the current time. Use this parameter if you want the output to be a wiggle of the property value sampled at a different time.

Example: position.wiggle(5, 20, 3, .5) produces about 5 wiggles per second with an average size of about 20 pixels. In addition to the main wiggle, two more levels of detailed wiggles occur with a frequency of 10 and 20 wiggles per second, and sizes of 10 and 5 pixels, respectively.

This example, on a two-dimensional property such as Scale, wiggles both dimensions by the same amount:

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  v = wiggle(5, 10);
  [v[0], v[0]]

This example, on a two-dimensional property, wiggles only along the y axis:

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  freq = 3;
  amp = 50;
  w = wiggle(freq,amp);
  [value[0],w[1]];

Paul Tuersley provides a script on the AE Enhancers forum that automatically adds wiggle, smooth, and loop expressions to selected properties.

Dan Ebberts provides an example expression and a detailed explanation on his MotionScript website that shows how to use the time parameter of the wiggle method to create a looping animation.

https://motionarray.com/blog/6-common-after-effects-expressions-you-should-be-using

Keyboard shortcuts:

AA – Material options
/ – Sets the composition preview magnification to 100% (on main keyboard)
Option+Command+f – Scales footage in timeline to fit the composition window
Option+Command+Shift+h – for width
Option+Command+Shift+g – for height
u – Reveals all properties with keyframes on a selected layer in the timeline
uu – Reveals all changed properties on a selected layer in the timeline
e – Reveals the effects on a selected layer in the timeline
ee – Reveals all properties with expression on a selected layer in the timeline
Command+k – Opens the Compositions Settings Window
‘ (Apostrophe) – Turns Title/Action Safe on and off
Home – Moves the current time indicator to the start of the timeline (0:00:00:00)
End – Moves the current time indicator to the end of the timeline

Simple Postion Random Expression

seedRandom(index,true);
x = random(0,1500);
z = random(0,1500);
[x,value[1],z]

Try using a constant for the seed rather than the layer index, like this:
seedRandom(1,true);

Fade opacity of a 3D layer based on distance from camera

startFade = 500; // Start fade 500 pixels from camera. endFade = 1500; // End fade 1500 pixels from camera. try { // Check whether there’s a camera C = thisComp.activeCamera.toWorld([0,0,0]); } catch(err) { // No camera, so assume 50mm w = thisComp.width * thisComp.pixelAspect; z = (w/2)/Math.tan(degreesToRadians(19.799)); C = [0,0,-z]; } P = toWorld(anchorPoint); d = length(C,P); linear(d,startFade,endFade,100,0)

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