Root Object


Default values should be used when importing an OCA document if the data can’t be read or is not available.
If there is no default value, importing the OCA document should fail.

Name Type Default Description
backgroundColor float[] [0.0, 0.0, 0.0, 0.0] The color of the background, in an [R,G,B,A] array, each value in the range [0.0 - 1.0]. The values may be higher than 1.0 if and only if the color depth is F16 or F32.
colorDepth string U8 The colors used in the frames. See the Color Depth section.
endTime int 240 The last frame number in the animation. The frame with this number is not part of the animation; the exact duration in frames is endTime - startTime
height int 1080 The height, in pixels.
frameRate float 24.0 The frame rate, in frames/second.
layers LayerObject[] [] The layers used in the animation. See the Layer Object section.
Layers are stored from bottom to top, the first layer in the list is the bottom one (the background).
name string "Untitled" The name of the animation.
ocaVersion string "0.0.0" The version of OCA used in this file.
Must be one of the versions listed in the changelog.
originApp string "Unknown" Deprecated since 1.2.0 *. The application name from which the document was exported.
originAppVersion string "0.0.0" Deprecated since 1.2.0 *. The version of the origin application.
startTime int 0 The first frame number in the animation.
width int 1920 The width, in pixels.

* Deprecated values will be removed in the next major version of OCA.
originApp and originAppVersion are now stored in the metadata file, and should be read if and only if there is no metadata file in the OCA folder.


If the layers don’t have the same size as the document (this root object), they may be cropped, but they’re never scaled.

In the same manner, if layer durations are longer than endTime - startTime, or if their first frame is lower than the start time, there may be frames not visible or outside of a timeline.


This is an empty document, without any layer.

    "name": "Document_name",
    "frameRate": 24,
    "width": 1920,
    "height": 1080,
    "startTime": 0,
    "endTime": 220,
    "colorDepth": "U8",
    "backgroundColor": [
    "layers": [ ],
    "ocaVersion": "1.1.0",
    "originApp": "Krita",
    "originAppVersion": "5.0.0"