1 Matte to Mask them all…
1 Matte Mask, an FxFactory plug-in from Monadnock Media, is a powerful masking plug-in that uses only one matte track to mask an unlimited number of video and still layers. Unlike with other tools, your masked footage need not be the same resolution as your matte or sequence. You can also scale, rotate, and pan your footage anywhere behind your matte.
Use 1 Matte Mask for custom split screens, graphic templates, or projection mapping. Use it anytime you need to mask video or pan stills within predefined areas of your frame. You can even combine it with an animated mask.
1 Matte Mask was designed for Adobe Premiere, but will work in other FxFactory platforms with one or two additional steps. The following instructions are for Premiere Pro, with an addendum for AE, Motion, and Final Cut.
To start using 1 Matte Mask, first create an RGB matte image in a tool like Photoshop or After Effects. The matte image should be the same size as your Premiere sequence. Create separate mask sections with different colors (any color works, but red, green, blue, cyan, magenta, and yellow are recommended for ease of use). You can create your mask as a movie rather than image if you want your mask to be animated.
Place your matte on a video track in your timeline. I like to dedicate Track 1 to my mask. You can hide the track if you want, or keep it visible to sample colors from.
Next add footage or an image that you want to mask to another video track in the timeline. IMPORTANT: Do not scale, rotate, or reposition this footage in the clip’s Motion settings. Those transformations will be made within the plug-in.
Now add the 1 Matte Mask effect to your clip. In the Effect Controls window, use the eyedropper or the color picker to select the color of the area where you want to mask your footage. You may choose multiple colors if you want your image to span several matte areas.
Use the Masked transform tools within the plug-in to scale, rotate, and reposition your footage behind your mask. You can visualize and offset the anchor point by checking “Anchor Visible”. You may keyframe these values to pan or zoom the image behind the mask. Remember to uncheck “Anchor Visible” before rendering!
If you need to refine the edges or your mask, you can use the Matte Refinement tools. These settings can eliminate hairline gaps when spanning an image over multiple colors.
Addendum for Non-Premiere platforms:
In non-Premiere platforms, your masked clip will be cropped by its original bounds. This isn’t a problem when masking footage that is of equal or higher resolution than your sequence. If, for example, you are trying to mask a standard definition clip within a high definition sequence, your image will be cropped when you try to move it beyond its standard definition frame. In AE or Motion, you can fix this easily by using the effect’s “Grow Bounds” control. Simply adjust the Grow Bounds value until the resolution of your masked clip is larger than your sequence size.
In Final Cut Pro, if masking footage that differs in resolution from your project, you must make sure to choose “None” from the Spatial conform menu in the inspector. Also, if the footage to be masked is of lower resolution than the sequence you must make it a compound clip first. Right click on the footage in the timeline and choose “New Compound Clip.” Then apply 1 Matte Mask to your newly created compound clip.