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Text layer track mat ae.
First you will need to add a new layer directly on top of the layer you want to use it as a matte for.
In the following example i simply added a few shapes onto my new layer.
Text shapes a video or another composition.
However you can add a track matte to the top layer to control its opacity.
Within the duplicated or split layers the track matte layer remains on top of the fill layer.
Track mattes in adobe after effects.
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In some ways track mattes may sound complicated but when put into practice they re rather simple.
The mask tracking analysis searches for content inside the mask.
The layer being tracked must be a track matte an adjustment layer or a layer with a source that can contain motion.
Each layer in the after effects timeline has a series of switches and modes.
This process is called parenting and it will ensure that your file is motion tracked along with the null object.
So simple in fact that adobe after effects has track matte functionality built into the timeline window of its interface.
For example if your project contains layers a and b where a is the track matte and b the fill layer duplicating or splitting both of these.
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In the project pane that s in the lower left corner of after effects click and drag the spiral icon that s right of your file s name onto the null 1 title and then release your mouse.
The video is now inside the text layer and the background is black the eye will disappear for the text layer and a icon appears telling you that the text is now acting as a matte.
How to use track mattes in adobe after effects.
Select the video layer and change the trkmat pulldown from none to alpha matte music the name will be the layer on top.
This includes layers based on video footage and precompositions but not solid color layers or still images.
The underlying layer the fill layer gets its transparency values from the values of certain channels in the track matte layer either its alpha channel or the luminance of its pixels.
Plus you can add effects to the text layer or even change the font while keeping your animation in tact.
Instead use the text layer s alpha channel as a track matte and you can animate the text in its entirety.
This layer can be anything you want.
After effects preserves the order of a layer and its track matte after you duplicate or split the layer.
