Ken Burns

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What this node does

Ken Burns animates one still image (COMFYTV_IMAGE) into a COMFYTV_VIDEO by smoothly interpolating a crop window from a start framing to an end framing — the classic documentary pan-and-zoom. You set the output size, frame rate, duration, the start/end zoom and center, and an easing curve; it renders on ▶ Run. An image must be wired into the image input or Run errors. Output is COMFYTV_VIDEO. To feed native ComfyUI nodes, insert a Bridge — see the bridge guide.

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When to use it

• Bring a photo, still frame, or generated image to life for a slideshow or intro.
• Add subtle motion behind a title, quote, or interview cutaway.
• Push in on a detail (zoom toward a face or object) over a few seconds.

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Parameters

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width / height

Output resolution in pixels, each 16–4096, defaults 1280 × 720.

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fps

Output frame rate, 1–120, default 24.

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duration

Clip length in seconds, 0.5–120.0 (step 0.5), default 5.0.

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start_zoom / end_zoom

Zoom factor at the start and end of the move, each 1.0–6.0, defaults 1.0 (start) and 1.3 (end). 1.0 frames the whole image; higher crops in tighter. Different start/end values create the push-in or pull-out.

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start_x / start_y and end_x / end_y

The crop center at the start and end, as normalized coordinates 0.0–1.0. Defaults are all 0.5 (image center). Change start vs. end to pan across the image.

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interp

Easing of the move. Options: linear (constant speed), smooth (ease in and out), ease_in, ease_out. Default smooth.

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Outputs

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Tips

• For a pure zoom, keep the centers equal and vary only start_zoom/end_zoom; for a pure pan, keep the zooms equal and move the centers.
• Keep end_zoom at or above start_zoom (both ≥ 1.0) so the crop stays inside the image.
• smooth easing reads most naturally for slideshows; linear feels more mechanical.

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Related nodes

• Pattern — generate a procedural clip instead of animating a still.
• Image Stage / loaders — produce or bring in the still you feed here.