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OBS Shader - StreamUP Test Card

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StreamUP Test Card Shader

Turn any source into a labelled test card, so you can build and rehearse your overlay before the real inputs exist.

Colour bars, an alignment grid, a solid colour, or your own image, with a label on top so you know what you're looking at. Built for placeholder inputs: add four Colour Sources, drop this filter on each, label them CAMERA 1 to 4, and frame a multi-cam layout on a machine that doesn't have the capture cards plugged in yet.

This is the shader version, running on the free obs-shaderfilter plugin by Exeldro. If you want free-typed labels in any font, there's also a native Test Card plugin. Same idea, this one is the lighter drop-in.

Key features

  • Four backgrounds. SMPTE style colour bars, a grid and crosshair alignment chart, a flat colour, or your own image with Stretch, Fit or Fill.
  • Preset word labels. Build the label from a word dropdown (CAMERA, SOURCE, INPUT, FEED and more) plus an optional number. Covers CAMERA 1 to 4, INPUT 1 to 4 and friends.
  • Label plate. Optional rounded plate behind the text so it stays readable over busy bars.
  • Frame border. Optional border round the edge of the card.
  • Set and forget. Configure each instance once and it just sits there doing its job.

One honest limitation: shaders can't read the source name or accept typed text, OBS only hands them numbers, colours and toggles. That's why the label is a word dropdown plus a number. If you need proper typed text, the native Test Card plugin does exactly that.

Getting started

  1. Install the free obs-shaderfilter plugin if you don't have it.
  2. Add the shader file to your shaders folder.
  3. Apply a User-defined shader filter to a Colour Source, load the file, pick a background and build your label.

Requirements

  • Windows, macOS, or Linux
  • OBS Studio
  • obs-shaderfilter plugin (free, by Exeldro)

Patch notes

v0.0.1, 2026-07-03

  • First release. Four background styles: SMPTE style colour bars, grid and crosshair alignment chart, flat colour, or your own image with Stretch, Fit or Fill mapping.
  • Label built from a preset word plus number using a baked 3x5 font, with an optional plate behind it and an optional frame border.

Support

If something's broken or you want another background style, give me a shout on Discord. Always the fastest way to get it onto the next patch.

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