filterStrength
Specify the strength of the input filter. To apply an automatic amount of filtering based the compression artifacts measured in your input: We recommend that you leave Filter strength blank and set Filter enable to Auto. To manually apply filtering: Enter a value from 1 to 5, where 1 is the least amount of filtering and 5 is the most. The value that you enter applies to the strength of the Deblock or Denoise filters, or to the strength of the Advanced input filter.