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Write per-pixel effects with the FFmpeg geq filter
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What this guide covers
For editors and motion designers who want a flip, emboss, position-based colour tint or radial gradient from a single expression. You end with an expression built from the FFmpeg manual's examples. Documentary review; no command was run.
More about this guide
Guide ID: art_01M6VTVCP7F63VC5GJQNXBCZ86
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Guide title
Write per-pixel effects with the FFmpeg geq filter
Coverage
For editors and motion designers who want a flip, emboss, position-based colour tint or radial gradient from a single expression. You end with an expression built from the FFmpeg manual's examples. Documentary review; no command was run.
Example
A hypothetical test still gets the manual's horizontal flip and then the position-dependent RGB tint, to be compared with the original; no result was seen.
Useful starting points
- Do not mix luma/chroma option names with red/green/blue option names, or colours will look wrong.
- Expressions that depend on earlier state give changing results with several filter threads; limit filter threads to 1.
- Reads outside the frame are clipped to the nearest edge, so edge pixels can look repeated.
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