Using Rotato videos with alpha transparency in After Effects

Use an alpha-capable export when you want to place your mockup over another layer in After Effects.

Export from Rotato

1. Set Background to Transparent.
2. Click Render Movie and choose ProRes 4444, or export a PNG Sequence.
3. Save the output and note the frame rate.

Composite in After Effects

Import the movie or image sequence, then place it above a colored layer. The background should show through the empty parts of the render.

If it does not, inspect the imported footage's alpha interpretation and test the source in Rotato's transparency tester. Check the original output before applying a workaround tied to an older macOS release.

For image sequences, match the interpreted frame rate to the export. See PNG sequences in After Effects.