Filter fspp
  Apply Fast Simple Post-processing filter.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
fspp AVOptions:
  quality           <int>        ..FV..... set quality (from 4 to 5) (default 4)
  qp                <int>        ..FV..... force a constant quantizer parameter (from 0 to 64) (default 0)
  strength          <int>        ..FV..... set filter strength (from -15 to 32) (default 0)
  use_bframe_qp     <boolean>    ..FV..... use B-frames' QP (default false)

This filter has support for timeline through the 'enable' option.

