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Compare an encode with its source using FFmpeg psnr and ssim
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What this guide covers
For editors and encoders who want to compare encoder settings or filters by number as well as by eye. You end with PSNR and SSIM figures and per-frame logs for each candidate encode. Based on the FFmpeg filters manual; no command was run, and no score thresholds are given.
More about this guide
Guide ID: art_01M6VQEZYDP9QYR7CTHAQA07KY
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Guide title
Compare an encode with its source using FFmpeg psnr and ssim
Coverage
For editors and encoders who want to compare encoder settings or filters by number as well as by eye. You end with PSNR and SSIM figures and per-frame logs for each candidate encode. Based on the FFmpeg filters manual; no command was run, and no score thresholds are given.
Example
A hypothetical test compares two x264 quality settings against the same original; no run was made, so no results are claimed.
Useful starting points
- Both inputs must share resolution and pixel format, and the filters assume equal frame counts compared one by one.
- Absurd scores usually mean the frames are not aligned; reset timestamps on both inputs before comparing.
- The first input is the clip under test and the second is the reference; mixing them up changes what the numbers mean.
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