Merge Captions

Node type: utility:merge_captions
Category: Data

Description

Stitches two whisper word_timestamps tracks into one continuous caption stream. Track 2 gets shifted forward by offset_seconds, then both tracks are merged and sorted by start time. Wire the output to a Compose Video captions input so captions span the whole reel without merging the underlying audio files.

Each input accepts a plain array of { word, start, end } items, a JSON string of the same, or a wrapper object shaped { word_timestamps: [...] } or { captions: [...] } (whisper's output shape works directly).

Canvas ports

These appear as port handles on the left side of the node.

ID	Label	Details
captions_1	Captions 1	JSON (required)
captions_2	Captions 2	JSON (required)

Sidebar config

These render as form fields in the right-side config panel when the node is selected.

ID	Label	Details
offset_seconds	Offset (s)	NUMBER · default 10. Seconds added to every word in track 2 (typically the duration of clip 1)

Outputs

ID	Label	Type
captions	Merged Captions	JSON
word_timestamps	Word Timestamps	JSON

Both outputs carry the same merged array.

Notes

• Fails if both inputs are empty or unparseable; one empty input is fine.

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Auto-generated from the Wireflow node registry.