Video properties in RenderScript
Duration
Duration in seconds, or 'media' to match the source video's full length.
Example
"duration": "media",Default
"duration": "media",Source
URL or GUID of the video file. When using AI generation (via 'provider' property), this becomes the text prompt for video generation.
Example
"source": "https://...",Default
"source": null,Provider
Enables AI video generation using specified provider and model. When set, the 'source' value is used as the generation prompt. Use the template editor to understand how the provider is formatted.
Example
"provider": "stabilityai ...",
"source": "A beautiful sunset"Default
"provider": null,Fit
Controls how the video is resized within the element bounds: 'cover' (fills area, may crop), 'contain' (fits entirely, may letterbox), or 'fill' (stretches to fill).
Example
"fit": "contain",Default
"fit": "cover",Video trimming
Extract a portion of the source video. 'trim_start' sets the starting point (seconds), 'trim_duration' limits the extracted length (seconds). Both work together to define the clip boundaries.
Example
"trim_start": 5,
"trim_duration": 10,Defaults
"trim_start": null,
"trim_duration": null,Loop
Repeats the video continuously when it ends. Cannot be used with trim_start or trim_duration properties.
Example
"loop": true,Default
"loop": false,Volume
Audio volume level from 0% (muted) to 100% (original volume).
Example
"volume": "50%",Default
"volume": "100%",Audio fading
Gradual volume transitions at video boundaries. 'audio_fade_in' creates a fade from silence over the specified duration (seconds) at the start, 'audio_fade_out' fades to silence at the end.
Example
"audio_fade_in": 2,
"audio_fade_out": 2,Defaults
"audio_fade_in": null,
"audio_fade_out": null,