Qt Lottie Animation

Qt Lottie Animation provides a QML API for rendering graphics and animations that are exported in JSON format by the Bodymovin plugin for Adobe After Effects.

Getting Started

Import the types using the the following statement:

import Qt.labs.lottieqt

See the GitHub page for Bodymovin for instructions on how to download and install the plugin for Adobe After Effects.

Limitations

The implementation follows the master specification for bodymovin. Deviations in exported Bodymovin files compared to the specification are taken into account as much as possible when differences are noticed.

General limitations

  • precomps are not supported
  • expressions are not supported
  • the timeline only supports frame-mode, not time-mode

Animation level limitations

The following properties are not supported:

  • assets - reusable text and images
  • chars text

Layers

Only the shape layer and the alpha mask adjustment layer are supported.

The following properties are not supported:

  • ao (auto-orientation)
  • bm (blend mode)
  • maskProperties (masks)
  • sr (time stretch)

Shapes

The following elements and shapes are not supported:

  • the gstroke (group stroke) element
  • the star element
  • Nested Repeater shapes

Also note that the behavior when using multiple active trim paths (e.g. trim paths in nested groups) is unpredictable.

Effects

The only supported effects are Slide and Layer Fill.

Licenses

Qt Lottie Animation is available under commercial licenses from The Qt Company. In addition, it is available under the GNU General Public License, version 3. See Qt Licensing for further details.

Reference

© 2021 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.