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Remove green or blue spill from a keyed subject with FFmpeg despill
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What this guide covers
For editors and compositors with a keyed foreground that still carries a green or blue tint on skin and hair edges. They end up knowing how to set up FFmpeg's despill filter for either screen colour and how to check the result. Based on the FFmpeg manual and filter source; no command was run.
More about this guide
Guide ID: art_01M6VVYS4HJWRCQN0WB9SYMHMA
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Guide title
Remove green or blue spill from a keyed subject with FFmpeg despill
Coverage
For editors and compositors with a keyed foreground that still carries a green or blue tint on skin and hair edges. They end up knowing how to set up FFmpeg's despill filter for either screen colour and how to check the result. Based on the FFmpeg manual and filter source; no command was run.
Example
A hypothetical, not-run case: an interview shot against a green screen shows tinted hair edges, and the despilled foreground is compared side by side with an untouched copy on the new background.
Useful starting points
- Judge the despilled foreground against the new background, not against the original screen colour.
- If tint remains on a bluescreen clip, check that the filter's screen type matches the backdrop; the default assumes a green screen.
- Defaults and ranges can differ between FFmpeg versions, so read the filter help on your own build before tuning.
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