Video Difference Marker

Compare two video versions and add Resolve markers where visual changes occur.

Select reference and updated clips, run a two-stage visual comparison, and turn detected differences into markers for a focused human QC pass.

What it does for you

  • Stack two versions of a cut and get a marker on every visual change.
  • Finds swapped shots, regrades, added text and logos; identical stretches get no marker.
  • Two-pass scan: a fast pass finds changed ranges, a frame-accurate pass places the markers.
  • Runs FFmpeg in the background with a progress bar and a Cancel button.

Requirements

  • DaVinci Resolve Studio 19.1 or newer (the free version of Resolve blocks script windows).
  • Windows 10/11 and macOS 12+ (Apple Silicon and Intel). One file works on both.
  • FFmpeg (Windows: winget install Gyan.FFmpeg, macOS: brew install ffmpeg).
  • Install: copy the .lua file into Resolve's Scripts/Utility folder, then open it from Workspace > Scripts.
  • Tested in DaVinci Resolve Studio 21 on Windows 11. The script also runs on macOS (Intel and Apple Silicon). If anything does not work on your Mac, please report it on GitHub or by email.

Screenshots from DaVinci Resolve

Every image is the real tool running in Resolve Studio. Click one to see it full size.

Pick the old and new versions; stacked clips are detected automatically1 / 3

How to use it

1

Open the timeline used for review.

2

Select the old/reference clip and the new/updated clip in the browser.

3

If matching clips are stacked and have equal length, the tool can identify the lower track as Old and the upper track as New.