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Second-Party Plugins

Second-party plugins are officially maintained but distributed as separate packages to keep the core installation lightweight.

Overview

  • Audio Convert


    An AudioNode processor for converting audio sample types and resampling audio clips for playback.

    Details · Source

  • Comparison


    Select, extract, and upload comparison frames to Slow.pics with TMDB metadata integration.

    Details · Source

  • FFT Spectrum


    Displays the Fast Fourier Transform (FFT) spectrum of all the planes of a video clip.

    Details · Source

  • FrameProps Extended


    Extends the built-in Frame Properties tool with specialized categories and formatters.

    Details · Source

  • Histogram


    Per-frame video scopes: Levels, Luma, Vectorscope, and Waveform.

    Details · Source

  • Split Planes


    Visualize individual planes (e.g., Y, U, V) of a video clip to inspect channel-specific artifacts.

    Details · Source


Installation

Second-party plugins are officially maintained but distributed as separate Python packages. Note that many of these also require specific native VapourSynth plugins to be installed in your VapourSynth environment.

You can install plugins individually or choose one of the pre-configured bundles.

Optional: Recommended & Full Bundles

  • The recommended bundle includes Split Planes, FrameProps Extended, and Comparison.
  • The full bundle includes everything in the recommended bundle, plus Audio Convert, Histogram, and the third-party Native Resolution plugin.
Install recommended bundle
pip install vsview[recommended]
Install full bundle
pip install vsview[full]
Add recommended bundle
uv add vsview --extra recommended
Add full bundle
uv add vsview --extra full

Detailed installation for individual packages can be found in their respective sections below.


Audio Convert

Install Audio Convert
pip install vsview-audio-convert
Add Audio Convert
uv add vsview-audio-convert

The Audio Convert plugin integrates a specialized AudioNode processor into the VSView pipeline for reconciling differences between script audio and system playback capabilities.

Available Options

  • Sample type conversion
  • Sample rate conversion
  • SoX Quality presets

VapourSynth Requirements

  • ares: Required for SoX quality presets and higher-quality resampling.
  • atools: Fallback for basic sample type conversion if ares is not installed.

Comparison

Install Comparison
pip install vsview-comp
Add Comparison
uv add vsview-comp

The Comparison plugin provides an integrated workflow for extracting frames and uploading them directly to Slow.pics.

It features automated frame selection, filtering by picture type, and integration with TMDB.

Features

  • Frame Selection:
    • Choose frames manually or automatically based on frame count and time range.
    • Filter by picture types (I/P/B-frames) and combed frames.
    • Select the darkest and/or lightest frames using asymmetric Gaussian brightness scoring.
  • Probability Curve:
    • Bias which part of the timeline random frames are drawn from using an interactive curve editor.
    • Click Curve... next to the random frame count to open the editor.
  • TMDB Integration:
    • Search and retrieve metadata from TMDB to automatically populate collection names.
    • Customize the naming format in the plugin Settings.
  • Direct Upload:
    • Upload extracted frames to Slow.pics.
    • Configure login in the plugin Settings to upload directly.

Settings

Setting Default Description
Browser ID auto UUID sent to Slow.pics on every upload. (see Browser ID).
Allowed frame searches 150 Max attempts per frame slot before giving up.
Brightness candidates 0 (auto) Candidate frames to analyze for dark/light selection. 0 auto-scales from clip length and FPS.

Probability Curve Editor

Click Curve... (next to the random frame count) to open the curve editor and bias where in the timeline random frames are sampled from.

Action Effect
Double-click on the graph Add a control point
Drag a point Adjust its position and weight (Y-axis, 0 – 5)
Right-click / Del / Backspace Remove the point
Reset Restore flat uniform distribution

The boundary points (start/end frame) are fixed horizontally but their weights are editable. Y = 1 everywhere gives uniform sampling.

Dark / Light Frame Selection

Candidate frames are scored with an asymmetric Gaussian on their average luma (PlaneStatsAverage):

  • Dark: peak ≈ 6.5 % (σ left = 0.015, σ right = 0.15)
  • Light: peak ≈ 75 % (σ left = 0.45, σ right = 0.90)

Browser ID

Every upload is tagged with a persistent Browser ID UUID so Slow.pics can associate it with your browser session.

Claiming an anonymous upload

If you uploaded without being logged in, you can still claim the comparison afterwards:

  1. Copy your Browser ID from the plugin Settings (clipboard button).
  2. In your browser's dev tools (F12), go to Application → Cookies → slow.pics and set BROWSER-ID to that value.
  3. Reload the comparison page and claim it from the page menu.

When uploading while logged in, Slow.pics returns its own BROWSER-ID; the plugin adopts it automatically.

Script Integration

All set_output outputs are available by default. Pass allow_comp to explicitly exclude specific outputs.

VapourSynth Requirements

  • fpng (Optional): For slightly faster frame extraction.

FFT Spectrum

Install FFT Spectrum
pip install vsview-fftspectrum
Add FFT Spectrum
uv add vsview-fftspectrum

The FFT Spectrum tool provides a visualization of the Fast Fourier Transform (FFT) spectrum of all the planes of a video clip.


Histogram

Install Histogram
pip install vsview-histogram
Add Histogram
uv add vsview-histogram

Provides per-frame video scopes as tabs inside a single panel.

  • Updates are paused during playback and resume on the active tab when playback stops.
  • Right-click any plot to copy or save the view.

Note

The Luma tab uses Numba JIT compilation. A background pre-warm runs at startup; the tab is inactive until it completes.

Levels

Plots a per-plane pixel value histogram for the current frame.

Control Options Description
Bin resolution Auto, 256, 512, 1024 Number of histogram bins. Auto scales to the panel width.
Clamp factor 0.001 % – 100 % Clips peak bin counts to this percentage of total pixels, making smaller peaks visible.
Show unsafe zones on / off Highlights broadcast-illegal ranges (YUV limited range only).

Luma

Displays a luma scope using a VapourSynth ModifyFrame node, rendered through the standard graphics view.

Control Options Description
Frequency (Shift) 2 – 256 cycles (shift 1 – 8) Controls the number of luma cycles displayed across the scope.
Sawtooth style on / off Switches the rendering style from sine-like to a sawtooth waveform.

Only GRAY and YUV inputs are supported. RGB input shows an error overlay.

Vectorscope

Plots chroma (U/V) distribution on a 2D plane.

Graticules show 75 % and 100 % saturation circles, a skin-tone reference line, and primary/secondary color targets that automatically adjust based on the clip's color matrix (supporting Rec. 601, Rec. 709, Rec. 2020, and ST 240M).

Control Options Description
Mode Density, Chroma Wheel, Pixel Color Density: logarithmic heat-map with a phosphor color table.
Chroma Wheel: density map drawn over a full-color UV background wheel.
Pixel Color: each pixel plotted at its actual RGB-converted color.
Resolution Auto, 256, 512, 1024 Size of the internal scope image (square). Auto caps to the bit depth limit.
Matrix Auto, BT.709, BT.601, BT.2020, ST 240M Color matrix coefficients used for target graticules and signal conversion. Auto detects from clip properties or resolution.
Luma 0.01 – 2.00 Brightness scaling factor applied to the point cloud/glow. Only active in Chroma Wheel mode.

RGB input is not supported and shows a warning. GRAY input plots all pixels at neutral chroma.

Waveform

Plots pixel values column-by-column as a waveform. Logarithmic density scaling is applied per-column.

Control Options Description
Mode Luma, RGB/YUV Parade Luma: single Y-plane waveform.
Parade: one waveform per plane side-by-side (R/G/B or Y/U/V, depending on color family).
Resolution Auto, 256, 512, 1024 Vertical resolution of the scope. Auto caps to the bit depth limit.
Show zones on / off Overlays the neutral line and broadcast-limit lines (16/235 for luma, 16/240 for chroma) with shaded unsafe regions.
Dynamic gain on / off When on, scales brightness relative to the densest column. When off, scales relative to frame height.
Gain 0.1x – 10.0x Multiplier applied on top of the logarithmic scale.

CIE Chromaticity

Plots the chromaticity coordinates of the frame pixels onto a standard CIE chromaticity diagram (CIE 1931 xy or CIE 1976 u'v'). This allows visualizing the gamut coverage and color distribution of the video.

Graticules show the boundary triangles for common color gamuts (Rec. 709, Rec. 601, DCI-P3, and Rec. 2020) and a reference crosshair for the D65 white point.

Control Options Description
CIE Mode CIE 1931 (xy), CIE 1976 (u'v') Toggles between the CIE 1931 standard color space representation and the CIE 1976 Uniform Chromaticity Scale (UCS) representation.
Render Mode Density, Chroma Wheel, Pixel Color Density: logarithmic heat-map showing pixel density using a phosphor color table.
Chroma Wheel: density map drawn as a white glow over a full-color background chromaticity diagram.
Pixel Color: each pixel plotted at its actual RGB color, scaled by density and luma settings.
Resolution Native, 256x256, 512x512, 1024x1024 Size of the internal scope image. Native uses the height of the frame.
Luma 0.01 – 2.00 Brightness scaling factor applied to the point cloud/glow. Only active in Pixel Color and Chroma Wheel modes.
Gamuts Rec. 709, Rec. 601, DCI-P3, Rec. 2020 Checkboxes to toggle the display of the target gamut boundary triangles and labels on the diagram.

Only RGB input is supported. Other formats, or clips without a valid _Primaries frame property, will display an error overlay.


FrameProps Extended

Install FrameProps Extended
pip install vsview-frameprops-extended
Add FrameProps Extended
uv add vsview-frameprops-extended

This plugin adds more categories and formatters to the built-in Frame Properties panel.


Split Planes

Install Split Planes
pip install vsview-split-planes
Add Split Planes
uv add vsview-split-planes

Split Planes splits a video clip into its individual planes for inspection.

Features

  • Extends the Graphics View's default context menu to provide a way to offset chroma plane values.