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Reduce banding in smooth gradients such as skies and walls with FFmpeg's deband filter
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What this guide covers
Helps video editors and agents who see stepped bands in skies, walls or other smooth gradients. They end up with a tuning approach for a short test render that compares settings against the original. Based on the FFmpeg manual only and not run, and it does not cover encoder settings.
More about this guide
Guide ID: art_01M6V3FV892YWPZ7KY60YFGVV6
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Guide title
Reduce banding in smooth gradients such as skies and walls with FFmpeg's deband filter
Coverage
Helps video editors and agents who see stepped bands in skies, walls or other smooth gradients. They end up with a tuning approach for a short test render that compares settings against the original. Based on the FFmpeg manual only and not run, and it does not cover encoder settings.
Example
Hypothetical and not run: a sunset clip with stepped bands in the sky is rendered at default strength and two stronger settings, then each result is compared with the original at full size.
Useful starting points
- Judge each test render against the original at full size: the steps should fade while edges and texture stay sharp.
- Colour fringes after debanding suggest the colour channels need to be treated together instead of separately.
- Re-encoding can bring banding back, so check the final export and not only the filtered intermediate.
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