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Video Scopes

Video Scopes · screenshot coming soon

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What this node does

Video Scopes samples one frame of a COMFYTV_VIDEO and renders the chosen scope as a COMFYTV_IMAGE. You pick a scope and the frame time, then press ▶ Run (an ffmpeg pass on the server) to get the scope image. These are the same measurement scopes colorists use to judge exposure, contrast and hue.

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When to use it

  • Check whether highlights are clipping or shadows are crushed (waveform).
  • Verify white balance and channel balance (RGB parade).
  • Judge saturation and hue distribution (vectorscope).
  • Inspect overall tonal distribution (histogram) or gamut coverage (CIE).

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Parameters

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scope

Which scope to render:
  • waveform — luma waveform with a green graticule and numbers.
  • waveform_parade — RGB parade waveform (channels side by side).
  • vectorscope — color vectorscope (color3 mode) with named targets.
  • histogram — tonal histogram.
  • cie — CIE chromaticity scope (HDTV system/gamut, white point shown).
Default waveform.

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at_seconds

Which frame to measure, in seconds. Range −1 to 3600, default -1, where -1 means the middle of the clip.

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Outputs

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Tips

  • Leave at_seconds at -1 to scope the middle frame; set a specific time to check a known tricky moment (a blown window, a skin tone).
  • waveform_parade is best for spotting a color cast; vectorscope for skin-tone alignment along the I-line.
  • This scopes a single still frame, not the whole clip — sample several times if the shot changes exposure.

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Types and bridges

COMFYTV_VIDEO / COMFYTV_IMAGE are ComfyTV project snapshots, not native ComfyUI types. Use a Bridge (ComfyTV/Bridge) to interoperate with native nodes. See bridges.md.
  • Contact Sheet — a grid of sampled frames instead of one scope.
  • Scene Detect — find cuts, then scope a representative frame per shot.