deblock

Remove blocking artifacts from input video.

The filter accepts the following options:

filter: Set filter type, can be weak or strong. Default is strong. This controls what kind of deblocking is applied.
block: Set size of block, allowed range is from 4 to 512. Default is 8.
alpha
beta
gamma
delta: Set blocking detection thresholds. Allowed range is 0 to 1. Defaults are: 0.098 for alpha and 0.05 for the rest. Using higher threshold gives more deblocking strength. Setting alpha controls threshold detection at exact edge of block. Remaining options controls threshold detection near the edge. Each one for below/above or left/right. Setting any of those to 0 disables deblocking.
planes: Set planes to filter. Default is to filter all available planes.

Examples

Deblock using weak filter and block size of 4 pixels.
```
deblock=filter=weak:block=4
```
Deblock using strong filter, block size of 4 pixels and custom thresholds for deblocking more edges.
```
deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05
```

Similar as above, but filter only first plane.

deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05:planes=1

Similar as above, but filter only second and third plane.

deblock=filter=strong:block=4:alpha=0.12:beta=0.07:gamma=0.06:delta=0.05:planes=6