The mask tracking analysis searches for content inside the mask.
Text layer track mat ae.
Each layer in the after effects timeline has a series of switches and modes.
The track matte looks at the layer above.
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Track mattes in adobe after effects.
This process is called parenting and it will ensure that your file is motion tracked along with the null object.
This includes layers based on video footage and precompositions but not solid color layers or still images.
This layer can be anything you want.
Select the video layer and change the trkmat pulldown from none to alpha matte music the name will be the layer on top.
Instead use the text layer s alpha channel as a track matte and you can animate the text in its entirety.
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.
For example you can use a text layer as a track matte for a video layer to allow the video to only show through the shapes defined by the text characters.
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How to use track mattes in adobe after effects.
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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.
However you can add a track matte to the top layer to control its opacity.
So simple in fact that adobe after effects has track matte functionality built into the timeline window of its interface.
After effects preserves the order of a layer and its track matte after you duplicate or split the layer.
Within the duplicated or split layers the track matte layer remains on top of the fill layer.
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.
In some ways track mattes may sound complicated but when put into practice they re rather simple.
Plus you can add effects to the text layer or even change the font while keeping your animation in tact.
First you will need to add a new layer directly on top of the layer you want to use it as a matte for.
The layer being tracked must be a track matte an adjustment layer or a layer with a source that can contain motion.
Text shapes a video or another composition.
