Lottie JSON Structure for Animation
08 Jun 2021Lottie (Link) is an awesome animation library for web, android and ios, for creating animation files from aftereffects. However if you want to edit a lottie json file, it’s hard because the keys were abbreviated so as to reduce the size I guess.
There’s no official record of this. So python lottie docs had done a good job of decoding the json keys. Here are the main keys, I’ve extracted from their site.
Animation
| Lottie name | Type | Description | Attribute |
|---|---|---|---|
| layers | list of Layer | List of Composition Layers. | layers |
| v | str | Bodymovin Version. | version |
| fr | float | Frames per second. | frame_rate |
| ip | float | The time when the composition work area begins, in frames. | in_point |
| op | float | The time when the composition work area ends. | out_point |
| w | int | Composition Width. | width |
| h | int | Composition Height. | height |
| nm | str | Composition name. | name |
| ddd | 0-1 int | Composition has 3-D layers. | threedimensional |
| assets | list of Asset | source items that can be used in multiple places. | assets |
| fonts | FontList | Available fonts. | fonts |
| chars | list of Chars | source chars for text layers | chars |
Image
| Lottie name | Type | Description | Attribute |
|---|---|---|---|
| h | float | Image Height. | height |
| w | float | Image Width. | width |
| id | str | Image ID. | id |
| p | str | Image name. | image |
| u | str | Image path. | image_path |
| e | 0-1 int | Image data is stored as a data: url. | is_embedded |
Transform
| Lottie name | Type | Description | Attribute |
|---|---|---|---|
| a | MultiDimensional | Transform Anchor Point. | anchor_point |
| p | PositionValue | Transform Position. | position |
| s | MultiDimensional | Transform Scale. | scale |
| r | Value | Transform Rotation. | rotation |
| o | Value | Transform Opacity. | opacity |
| sk | Value | Transform Skew. | skew |
| sa | Value | Transform Skew Axis. | skew_axis |
MultiDimensional
| Lottie name | Type | Description | Attribute |
|---|---|---|---|
| k | list of float | Non-animated value. | value |
| ix | int | Property index. | property_index |
| a | 0-1 int | Whether it's animated. | animated |
| k | list of OffsetKeyframe | Keyframe list. | keyframes |
For more properties
Find the full list of properties here
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keywords: Lottie json, lottie structure,lottie json format, lottie json edit
Category :
Programming