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Video Speed

Video Speed · screenshot coming soon

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What this node does

Video Speed retimes a clip by a speed factor and can play it reverse. It’s a real re-encode on the server (PyAV / ffmpeg), so it runs on ▶ Run and saves the result as a project snapshot. Input and output are COMFYTV_VIDEO. If you leave speed at 1x and don’t enable reverse, there’s nothing to do and the run errors out — change the speed or flip reverse on.

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When to use it

  • Slow-motion emphasis on a moment, or a fast-forward montage.
  • Play a clip backwards for a rewind or loop effect.
  • Nudge a clip’s duration to fit a music beat or a target length.

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Parameters

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speed

The playback rate multiplier. Range 0.1–10.0, default 1.0, step 0.05. Above 1.0 is faster (shorter clip); below 1.0 is slower (longer clip). 2.0 = double speed, 0.5 = half speed.

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reverse

Play the clip backwards. Default off. Can be combined with a speed change.

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pitch_compensate

Default on. When on, the audio is time-stretched so voices/music keep their original pitch instead of turning chipmunk-high (fast) or low (slow). Turn it off if you want the classic tape-style pitch shift that follows the speed.

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Outputs

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Tips

  • speed = 1x with reverse off does nothing and raises an error — set one of them.
  • Extreme slow-motion (very small speed) does not synthesize new in-between frames; it stretches existing ones. Use a dedicated interpolation step first if you need smoothness.

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Bridge note

COMFYTV_VIDEO is a project snapshot reference, not a native ComfyUI tensor. To move between ComfyTV and native ComfyUI nodes, insert a Bridge (ComfyTV/Bridge). See https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md.
  • Video Clip — trim before or after retiming.
  • Video Volume — fine-tune audio level after a speed change.