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Video Volume

Video Volume · screenshot coming soon

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What this node does

Video Volume changes the loudness of a clip’s audio track and can ramp it up at the start (fade_in_s) and down at the end (fade_out_s). The picture is untouched. 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.

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When to use it

  • Bring a too-quiet or too-loud clip to a usable level before mixing.
  • Add a gentle fade-in at the start and fade-out at the end so cuts don’t pop.
  • Duck a clip’s own audio (volume below 1.0) before layering music with Mux Audio.

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Parameters

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volume

Gain multiplier applied to the audio. Range 0.0–8.0, step 0.05, default 1.0. 1.0 leaves the level unchanged; 0.0 mutes; 2.0 is roughly twice as loud. Large values can clip — push carefully.

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fade_in_s

Length of the fade-in ramp at the start, in seconds. Range 0–60, step 0.1, default 0.0 (no fade). The audio rises from silence to the target level over this time.

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fade_out_s

Length of the fade-out ramp at the end, in seconds. Range 0–60, step 0.1, default 0.0 (no fade). The audio falls to silence over this time before the clip ends.

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Outputs

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Tips

  • volume = 0.0 fully mutes the track (useful for silencing while keeping the fades slots).
  • Fades apply to the clip’s own edges; if you want them to line up with a cut, split/trim first, then fade.

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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.
  • Mux Audio — replace or mix in a different audio track.
  • Video Speed — retime the clip (with pitch-compensated audio).