Noise on boundaries when objects are placed on transparent background

When exporting a movie in the Cubism Animator tool, you can export it with the transparent background if you add a check mark to "Make Background Transparent" check box and select "Animation" for the type of compression at the video setting.

If you see the exported movie with QuickTime, you may find some noise around the frame of the image.

This is a problem to display on QuickTime, and it does not mean that the movie data is broken.

If you see it on the screen of the movie editor like After Effects, it will be displayed correctly as below.