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Blend two clips through a matte with FFmpeg maskedmerge
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What this guide covers
For compositors who want to show one clip where a grayscale matte is dark and another where it is bright. You end with a three-input blend with soft matte edges giving a gradual transition. Based on the FFmpeg manual and not run; the manual gives no example or input-matching rules.
More about this guide
Guide ID: art_01M6WEFMF02RTNEDP462BDNNZ8
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Guide title
Blend two clips through a matte with FFmpeg maskedmerge
Coverage
For compositors who want to show one clip where a grayscale matte is dark and another where it is bright. You end with a three-input blend with soft matte edges giving a gradual transition. Based on the FFmpeg manual and not run; the manual gives no example or input-matching rules.
Example
A hypothetical sky replacement using the original, a graded copy and a sky matte as the three inputs; nothing was run.
Useful starting points
- If the result looks inverted, the matte polarity is reversed; invert the matte.
- Check a frame where the matte has a soft gradient to see the blend.
- If only brightness changes, check the plane selection.
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