Set Clip Properties
set_clip_propertiesSet a clip's opacity, scale, position, and rotation in Premiere Pro, then read back requested values; speed is unsupported—use duration editing to change timeline length.
Instructions
Set supported clip properties (opacity, scale, position, rotation) and read each requested value back. Position uses pixels by default or explicit normalized 0–1 fractions; an omitted-unit 0–1 pair retains pixels with a warning. Clip speed is unsupported and fails before mutation; use set_clip_duration to change a clip's timeline length.
Tool call template
Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {
"node_id": "<node_id>"
},
"name": "set_clip_properties"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| scale | No | Scale percentage (0-10000; 100 = original size) | |
| speed | No | Unsupported by Premiere's documented scripting APIs. Supplying this returns an actionable error without mutating the clip; use set_clip_duration to change timeline length. | |
| units | No | Position units; pixels by default or normalized 0–1 sequence-frame fractions. Requires a position value. | |
| node_id | Yes | Node ID of the clip | |
| opacity | No | Opacity value (0-100) | |
| rotation | No | Rotation in degrees | |
| position_x | No | Horizontal position in the selected units: sequence pixels by default or normalized 0–1 fractions. | |
| position_y | No | Vertical position in the selected units: sequence pixels by default or normalized 0–1 fractions. | |
| idempotency_key | No | Optional client-chosen key (1-128 chars of A-Z a-z 0-9 . _ : -) for this intended edit. Pass a fresh key per edit and reuse it only when retrying that same edit, for example after a client-side timeout. A repeat with the same tool, key and arguments is not run again: while the first call is running it fails with IDEMPOTENCY_IN_PROGRESS (poll get_last_operations); after it finished it returns the original outcome marked replayed. A definite failure with nothing applied (receipt outcome not_applied) may be retried with the same key. Reusing a key with different arguments fails with IDEMPOTENCY_KEY_REUSED. Scoped to this MCP session (the stdio server process, or the HTTP server process when Streamable HTTP is stateless per request) and held in memory only (200 keys, 1 hour); it does not survive a restart or reconnect. Read-only invocations are never deduplicated. | |
| expected_cep_target | No | Optional reviewed CEP sequence/clip identity and exact tick ranges. Checked before every generated command; UXP refuses this CEP-only guard. | |
| expected_project_path | No | Optional absolute saved-project path. Every generated CEP command refuses before its body when the active project differs or is unsaved. UXP commands refuse this CEP-only guard; local-only tools do not inspect Premiere. Omit to keep existing behavior. |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| ok | Yes | Whether the tool completed successfully. | |
| data | No | Tool-specific result data when ok is true; on failure, diagnostic detail when the tool provides it. | |
| tool | Yes | The registered MCP tool name. | |
| error | No | Failure detail when ok is false. | |
| receipt | No | Versioned common mutation receipt; success never implies rendered verification. | |
| idempotency | No | Present when idempotency_key deduplicated this call: replayed is true when the original outcome was returned instead of running again. |