Soften a whole clip, from a light haze to complete abstraction. Each frame is blurred with a Gaussian kernel, which spreads every pixel evenly in all directions.
Blur amount
Blur Amount sets the radius, from 0 to 40 px on a 720p frame. A few pixels take the edge off compression artefacts and noise. Around 10 px faces lose their features. At 30 px and above only color and broad light remain, the look of a background plate behind titles.
Blur mix
Blur Mix blends the result over the untouched frame. Low values give a diffused, dreamy look without losing structure, close to a soft-focus filter. Full mix with a large radius makes a clip usable as a moving background behind text or a video call overlay.
Blur and file size
A blurred frame has little fine detail, and encoders spend most of their bits on detail. The export is often noticeably smaller than an unblurred export at the same resolution.