Filter phase
  Phase shift fields.
    Inputs:
       #0: default (video)
    Outputs:
       #0: default (video)
phase AVOptions:
  mode              <int>        ..FV...... set phase mode (from 0 to 8) (default A)
     p               0            ..FV...... progressive
     t               1            ..FV...... top first
     b               2            ..FV...... bottom first
     T               3            ..FV...... top first analyze
     B               4            ..FV...... bottom first analyze
     u               5            ..FV...... analyze
     U               6            ..FV...... full analyze
     a               7            ..FV...... auto
     A               8            ..FV...... auto analyze

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

