Filter asetnsamples
  Set the number of samples for each output audio frames.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (audio)
asetnsamples AVOptions:
  nb_out_samples    <int>        ..F.A.... set the number of per-frame output samples (from 1 to INT_MAX) (default 1024)
  n                 <int>        ..F.A.... set the number of per-frame output samples (from 1 to INT_MAX) (default 1024)
  pad               <boolean>    ..F.A.... pad last frame with zeros (default true)
  p                 <boolean>    ..F.A.... pad last frame with zeros (default true)


