Workshop 05 Time re-mapping Time-stretching, time-remapping are useful for creating slow motion, fast motion, freeze frame, or other re-timing results. Simple Time Reverse In the Timeline Select all layers (Cmd/ Ctrl A) Pre-comp (Ctrl shift C) Cmd/Ctrl+shift+D to split clip Delete part you don’t need Duplicate the part you do need to reverse Layer>Time >Time-Reverse Layer Drag layer to correct place in the timeline How to apply Time Remapping Import GI_danceRhythms.mov, tick Create Comp in the Import menu (or drag down from the project panel to the timeline to create)Open the layer and play the clip to see the movements. With the layer selected, Layer>Time>Enable time remapping Alternatively, you can also simply right click on the footage layer to access the drop down menu and select the same menu Either way, notice how you now have the possibility to key frame Time remapping Enable time remapping sets two default keyframes for the in and out point of the sequence: If you move the second keyframe to the left it will shorten the sequence.If you then copy the first keyframe and paste it at the end of the sequence it will run back and forth. Click in the diamond to create a new keyframe. This will relate to a point in time, which you can shift around. To create a hold, copy a key frame and paste it further along the timeline. To alter the duration of moments, drag the key frames further apart or closer together. Note though that if you speed up one portion of the sequence then the remainder will slow down unless – you move the end key frame along with the point out keyframe. You can also use the graph editor to manipulate the sequence. Press the button in the top of the timeline to access it: https://helpx.adobe.com/uk/after-effects/using/time-stretching-time-remapping.html In a Composition or Timeline panel, select the layer you want to remap. Choose Layer > Time > Enable Time Remapping. In the Timeline panel, click the name of the Time Remap property to select it. Move the current-time indicator to the time at which to add a keyframe, and click the keyframe button in the keyframe navigator to add a keyframe. In the Graph Editor, drag the keyframe marker up or down, watching the Time Remap value as you drag.To snap to other keyframes, Shift-drag. To slow the layer down, drag the keyframe down. (If the layer is playing in reverse, drag up.) To speed the layer up, drag the keyframe up. (If the layer is playing in reverse, drag down.) To play frames backward, drag the keyframe down to a value below the previous keyframe value. To play frames forward, drag the keyframe up to a value above the previous keyframe value. To freeze the previous keyframe, drag the current keyframe marker to a value equal to the previous keyframe value so that the graph line is flat. Another method is to select the keyframe and choose Animation > Toggle Hold Keyframe, and then add another keyframe where you want the motion to start again. Dragging the keyframe down slows down the layer Drag the mp3 file onto the sequence to see how the sequence looks with music. You can view the waveform by clicking on the arrows: Use RAM Preview to hear sound and picture playback: Click on this button in the Preview Panel You can extend (slow down) the sound layer with Time remap For a breakdown of all the different functions of time remapping see this helpful webpage: https://helpx.adobe.com/after-effects/using/time-stretching-time-remapping.html There is also a Timewarp effect which does similar things: https://helpx.adobe.com/after-effects/using/time-effects.html You can use the Timewarp effect to add motion blur within a video layer without changing the layer’s speed.Apply the Timewarp effect, set Speed to 100, enable motion blur within the effect, and use the manual shutter control features to adjust the motion blur. Time Games Time Stretch Use Layer>Time>Time Stretch To change the timing of the whole layer – so for example you can change the duration and make the layer twice as slow. Take care if you have keyframes and you want to extend the whole – then may be better to use the Interpret Footage panel (see tutorial below: https://www.lynda.com/After-Effects-tutorials/Using-Time-Stretch-vs-altering-frame-rates/79655/80672-4.html uses the Interpret Footage panel to change the Frame Rate and also loop options) To use this method, first select the original footage in the project bin Adobe’s helpful info on Frame rates https://helpx.adobe.com/uk/after-effects/using/importing-interpreting-footage-items.html#frame_rate Echo The Echo effect combines frames from different times in a layer. The Echo effect has a variety of uses, from a simple visual echo to streaking and smearing effects. Echoed animation Open a new comp 320 x 240 size and add CM_sphereGoldmelt.tif, scale and animate it so it moves around the screen. Open a new comp 320 x 240 and add the first one to it, add the echo effect and experimentEffect>Time> Echo Effect Use the Effects Controls panel to control effects! Echo Time (seconds) The time, in seconds, between echoes. Negative values create echoes from previous frames; positive values create echoes from upcoming frames. Number of Echoes The number of echoes. For example, if the value is 2, the result is a combination of three frames: the current time, the current time + Echo Time, and the current time + (2 * Echo Time). Starting Intensity The opacity of the first image in the echo sequence. Decay The ratio of the opacity of an echo to the opacity of the echo preceding it in the echo sequence. For example, if Decay is 0.5, then the opacity of the first echo is half of the Starting Intensity; the second echo is half of that, or one quarter of the Starting Intensity. Echo Operator The blending operation used to combine the echoes. Try ‘Composite in front’ Try to animate the ball with a Wiggle position effect. Go back to the animated ball Composition and go to Window>Wiggler Then select two Position keyframes and adjust the settings in the Wiggler Panel to animate the ball with a wiggle position effect, eg Noise Type Jagged Dimension Y Magnitude 10.0 Posterize time Use the clip CL_skatesequence.mov in a new comp 320X240. Time>Posterize Time set the frame rate to 6. Remove the effect and add AB_digidelic_loop.mov (under the skater). Add a rectangle mask to the skater layer and use an effect Stylize>Roughen edges Add an Adjustment layer (Layer>New>Adjustment) and add here the Posterize effect (Frame rate 6), it will affect all layers underneath. Ghosting effect using blending modes Open a new comp and insert AB_rainforest.mov. Duplicate the layer (Command D) and offset the underneath clip. ‘offset’ by (adding extra time to the Timeline – go to Composition settings add time to Duration) shifting the top layer along.Alternatively use the Sequence layers trick – select both layers and go to Animation>Keyframe Assistant>Sequence Layers Overlap the layers by the amount you want eg if you Overlap a 7 sec layer by 5 secs the (lower) layer will begin 2 secs later Use a blending mode on the top layer (Color dodge or Overlay). Add some colour correction such as Brightness and Contrast Time difference Open a new comp and insert AB_rainforest.mov apply Effect>Time>Time difference – result is grey as it compares clip with itself and there is no difference. Instead, duplicate and split a clip (Cmd/Ctrl +Shift + D), then add an Adjustment Layer above it and attach the effect to the Adjustment layer Effect>Time>Time difference Settings:Target to be the layer you want to offset with the Time effect Time offset – ‘The relative time in the comparison layer, in seconds, where the layers are compared’ * Contrast is 50 here * https://helpx.adobe.com/uk/after-effects/using/time-effects.html Individual workCreate a sequence using a sequence above combined with text
