clipwright-speed
AI-facing MCP tool that applies a LinearTimeWarp speed change to clips
in an OpenTimelineIO (OTIO) timeline.
What it does
clipwright_set_speed reads an existing OTIO timeline, attaches (or replaces)
a LinearTimeWarp effect on the target clip(s) using the given speed multiplier,
and writes the result to a new OTIO file. The input timeline is never modified
(non-destructive). Applying the same speed twice replaces rather than stacks
the warp (idempotent).
Tool: clipwright_set_speed
| Parameter | Type | Required | Description |
|---|---|---|---|
timeline |
string |
yes | Path to the input .otio timeline file |
output |
string |
yes | Path for the output .otio file (must differ from timeline) |
options.speed |
float |
yes | Playback speed multiplier (0.25–8.0). Values > 1.0 speed up, < 1.0 slow down. |
options.clip_index |
int | null |
no | Zero-based clip index in V1 (gaps excluded). null applies to all clips. |
Speed range
Valid range is 0.25 to 8.0 inclusive. Values outside this range return an
INVALID_INPUT error with a hint.
Idempotency
Applying clipwright_set_speed twice with the same speed on the same clip
results in exactly one LinearTimeWarp effect — no stacking.
Non-destructive
The input timeline file is never modified. All changes go to the output path.
Foreign warps
Pre-existing LinearTimeWarp effects that were not created by
clipwright-speed (i.e., lacking metadata["clipwright"]) are preserved.
MCP Registration Example
{
"mcpServers": {
"clipwright-speed": {
"command": "clipwright-speed"
}
}
}
Or with an explicit Python path:
{
"mcpServers": {
"clipwright-speed": {
"command": "/path/to/.venv/bin/python",
"args": ["-m", "clipwright_speed.server"]
}
}
}
Prerequisites
- Python 3.11+
- opentimelineio 0.18+
- clipwright 0.3.0+ (core package)
License
MIT
1 maintainer
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-
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