Filter codecview
  Visualize information about some codecs.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
codecview AVOptions:
  mv                <flags>      ..FV..... set motion vectors to visualize (default 0)
     pf                           ..FV..... forward predicted MVs of P-frames
     bf                           ..FV..... forward predicted MVs of B-frames
     bb                           ..FV..... backward predicted MVs of B-frames
  qp                <boolean>    ..FV..... (default false)
  mv_type           <flags>      ..FV..... set motion vectors type (default 0)
     fp                           ..FV..... forward predicted MVs
     bp                           ..FV..... backward predicted MVs
  mvt               <flags>      ..FV..... set motion vectors type (default 0)
     fp                           ..FV..... forward predicted MVs
     bp                           ..FV..... backward predicted MVs
  frame_type        <flags>      ..FV..... set frame types to visualize motion vectors of (default 0)
     if                           ..FV..... I-frames
     pf                           ..FV..... P-frames
     bf                           ..FV..... B-frames
  ft                <flags>      ..FV..... set frame types to visualize motion vectors of (default 0)
     if                           ..FV..... I-frames
     pf                           ..FV..... P-frames
     bf                           ..FV..... B-frames

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

