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Grow or shrink bright areas of a mask with FFmpeg inflate and deflate
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What this guide covers
For compositors and editors adjusting mattes or masks. You end with a way to nudge bright areas outward or inward with the FFmpeg inflate and deflate filters and limit the change per plane. Based on the FFmpeg manual; no command was run, and the effect size was not measured.
More about this guide
Guide ID: art_01M6WCEYTHBEXPYQVJ8TG5DKZJ
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Guide title
Grow or shrink bright areas of a mask with FFmpeg inflate and deflate
Coverage
For compositors and editors adjusting mattes or masks. You end with a way to nudge bright areas outward or inward with the FFmpeg inflate and deflate filters and limit the change per plane. Based on the FFmpeg manual; no command was run, and the effect size was not measured.
Example
A hypothetical soft matte with a harsh edge is passed through deflate once and viewed; nothing was run, so the result is unknown.
Useful starting points
- If nothing changes, a plane threshold may be set to 0, which leaves that plane unchanged.
- Inflate follows brighter neighbours and deflate darker ones; check you picked the right direction.
- If the effect is too weak, chaining more passes is an untested idea worth trying on a copy.
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