As we all know, in Photoshop layer masks, white means show (opaque) or work (adjust the layer mask), black means not show (transparent) or not work, and gray means partially show or partially work. This approach is similar to the mask (Matte) in Premiere Pro. Masks in Premiere Pro are similar to vector masks in Photoshop, with shapes (paths) representing areas that are shown or not shown.
Using masks in Pr, you can define specific areas in a clip to blur, overlay, highlight, apply effects, or correct colors. So, in Pr, a mask is a region, what works in the region, what doesn’t work out of the region.
Most effects controls in Pr have three tools for drawing shape masks: the Ellipse Tool, the Rectangle Tool, and you can use the Pen Tool to draw free-form Bezier curves.
Know the mask
Operating the mask
Click on the corresponding mask of the corresponding option in the Effects control panel to edit the mask in the move tool state.
(1) isometric overall scaling mask
To resize the mask, simply place the cursor outside the vertex and drag the mouse while holding down the Shift key (the cursor becomes a two-way arrow).
(2) Rotate the mask
Simply place the cursor outside the vertex (the cursor will become a curved, two-way arrow) and drag. Hold down the Shift key and drag the cursor to rotate in units of 22.5 degrees.
(3) Change the mask shape
Method 1: Drag the vertex using the Selection tool
You can box multiple vertices, or hold down the Shift key and click multiple vertices.
To deselect all selected vertices, click outside the mask of the current activity.
Note: The ellipse shape does not hold when you drag the mask.
Method 2: Use the arrow keys on the keyboard
Use the arrow keys on your keyboard to nudge the selected vertex one distance unit.
Press Shift and use the arrow keys to Shift the selected vertex by five distance units.
(4) Add or delete vertices
Place the cursor at the edge of the mask (path line) and press Ctrl/Cmd (optional). When the cursor becomes a pen shape with a “+” sign, click to add a vertex.
Place the cursor at the vertex you want to remove and press Ctrl/Cmd at the same time. When the cursor becomes a pen shape with a “-” sign, click to delete the vertex.
(5) Transition point
Like PS, vertices come in both angular and smooth forms. Press Alt/Opt to click the vertex. You can also press Alt/Opt single side to adjust the lever of smooth points.
(6) Feather the mask edge or adjust the mask extension
A. Feathering handle that can control feathering B. Extended handle that can expand and shrink masks C. Mask position handles for removable controls d. extended wires e. feathered wires
You can also adjust masks by specifying values using the Effects control panel. For example, trace the mask, change the opacity, extend the mask, reverse the mask, or feather the edge of the mask.
(7) Copy and paste masks
Easily copy (Ctrl/Cmd + C) and paste (Ctrl/Cmd + V) masks between clips or effects.
(8) Delete the mask
Select the mask in the Effects control panel and press Delete.
The mask to track
After you apply a mask to an object, Premiere Pro makes the mask automatically follow the object, moving it from frame to frame.
For example, after you blur your face with a mask shape, Premiere Pro automatically tracks the position of the mask section that appears between frames as the person moves.
Tip: If you want to use the more advanced tracing features available in After Effects, use the Pr menu: File /Adobe Dynamic Link feature to send your sequences to After Effects.
Masks in the Basic graphics panel
In the basic graphics panel, you can use the upper text or shape as a mask. The options associated with the basic graphics panel can also be adjusted in the Effects control.
The text or shape used as a mask must be placed on the top layer and only affect the layer below it, and will not affect the clip below it on the timeline panel.
If the text or shape as a mask is understood as a region, it is in principle the same as the mask described above.
The effect is similar to that of Track Matte Key. The difference is that after you add the track mask key effect to the clip, you need to use the clip of one of the tracks directly above it as the Matte.
Another difference is that in the track mask key, you can use a stripped PNG image as a mask, not the basic graphics panel. \
The mask application
1. Local occlusion
One common use is to obscure a person’s face to protect his identity. For example, a person’s face can be obscured by applying a blur effect or Mosaic effect.
It can also be used to cover some special objects on the picture, such as signs and so on. \
You can also crop the image by blocking it, such as making it 16:9 scale, or creating a double screen effect. \
After rendering mask to static pictures and other materials, it can realize fast matting.
2, simple to go
For unwanted objects in the screen, you can simply remove them using a mask.
General operation steps: copy the clip, stack it up and down, then mask the upper clip to select the object, reverse the mask, and then move the following clip to the X-axis or Y-axis position, and then feather the mask. \
3, zoning school color
Apply a mask to correct a particular color. Reverse masks can also be used to exclude the masked area from the color correction applied to the rest of the clip.
General instructions: Copy the clip, stack it up and down, then mask and color the clip above. \
4. Creative transformation
A common practice is to use obstacles in the scene such as trees, pedestrians, vehicles, etc., to transition to the next clip. Generally, you need to set key frames for the mask path frame by frame.
