Create Source Freeze Frame
create_source_freeze_frameCreates a freeze-frame image from a source project item at a specified source-media time, saves it to a new image path, and can place it on an empty video track range.
Instructions
Create a freeze frame from a project item at a SOURCE-media time (not a sequence time; for a sequence time use freeze_frame). Decodes the frame with ffmpeg from the item's media file (requires ffmpeg/ffprobe on PATH; no Source Monitor or QE state is used), refuses to overwrite an existing output file, imports the still and sets its Out mark to duration_seconds. Optional place puts it on an empty range of one video track (refuses an occupied or locked range rather than overwriting); optional zoom (requires place) adds Motion Scale and optional Position keyframes at the clip's first and last frame for a punch-in. Every step is read back; partial success reports which steps were committed but not verified. Refuses before any change when the item has no readable local media, the time is past the media end, or the item's interpreted frame rate differs from the file's.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| zoom | No | Optional punch-in keyframes on the placed clip's Motion effect (requires place). Scale is percent as Premiere reports it for the placed still; Position is in sequence pixels. | |
| place | No | Optional placement on the active sequence. The range must be empty; nothing is overwritten. | |
| output_path | Yes | New .png, .jpg or .jpeg path for the frame. Must not exist; its folder must exist. | |
| source_item_id | Yes | Node ID (preferred) or exact name of the source video project item. | |
| 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 one HTTP session) and held in memory only (200 keys, 1 hour); it does not survive a restart or reconnect. Read-only invocations are never deduplicated. | |
| duration_seconds | No | Length of the still in seconds, written as its Out mark and read back (default 2, at most 3600). | |
| 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. | |
| source_time_seconds | Yes | Seconds from the first frame of the source media (media time zero, not its start timecode and not its In mark). Snapped down to the item's frame grid. | |
| 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. |