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Extract Frames

Extract Frames · screenshot coming soon

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What this node does

Extract Frames pulls one or more still frames out of a clip at the timestamps you set with the marker strip in the node body. On ▶ Run the server (PyAV / ffmpeg) decodes those frames and returns them as a COMFYTV_IMAGES batch saved as a project snapshot. Input is COMFYTV_VIDEO. The marker strip drives a hidden marks field (a JSON list of seconds) — you don’t type the list by hand. You need at least one mark, and the backend caps the batch (up to a few dozen frames per run).

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When to use it

  • Pull key stills from a clip to use as reference or thumbnails.
  • Grab a first/last/middle frame to seed an image-generation or edit step.
  • Sample several moments from a shot to compare composition.

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Parameters

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marks (hidden)

A JSON list of timestamps in seconds, one per frame to extract. Driven by the marker strip in the node body — add marks on the clip preview rather than editing text. Duplicate and negative times are cleaned up; if no valid marks are set, the run errors out.

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Outputs

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Tips

  • This is the multi-frame tool; for a single frame with first/last/middle presets, use Extract Frame instead.
  • There is an upper limit on how many frames one run extracts — mark the moments you actually need rather than sampling densely.

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Bridge note

COMFYTV_VIDEO and COMFYTV_IMAGES are project snapshot references, not native ComfyUI tensors. To move between ComfyTV and native ComfyUI nodes, insert a Bridge (ComfyTV/Bridge). See https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md.
  • Extract Frame — grab a single frame (first / last / middle / custom time).
  • Image Picker — choose one image from the extracted batch.