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Blur with separate horizontal and vertical sigma using FFmpeg gblur
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What this guide covers
For editors who need a controlled Gaussian blur on a clip or still, such as softening a background or hiding a sign. You end with a blur whose horizontal and vertical strength you set separately. Based on the FFmpeg manual only; nothing was run, and the manual gives no examples.
More about this guide
Guide ID: art_01M6W3E39F3K3VP6VF04Y6QEP2
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Guide title
Blur with separate horizontal and vertical sigma using FFmpeg gblur
Coverage
For editors who need a controlled Gaussian blur on a clip or still, such as softening a background or hiding a sign. You end with a blur whose horizontal and vertical strength you set separately. Based on the FFmpeg manual only; nothing was run, and the manual gives no examples.
Example
A hypothetical sign in the background of a shot, blurred at one setting and then with different horizontal and vertical values to see which hides the text. Not run.
Useful starting points
- The default sigma of 0.5 is very mild, so almost no change usually means the value needs raising.
- Leaving the vertical sigma at its default makes it follow the horizontal one.
- Compare the result against the source at full size, not a thumbnail.
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