Muxer asf_stream [ASF (Advanced / Active Streaming Format)]:
    Common extensions: asf,wmv,wma.
    Mime type: video/x-ms-asf.
    Default video codec: msmpeg4v3.
    Default audio codec: wmav2.
ASF stream muxer AVOptions:
  -packet_size       <int>        E........ Packet size (from 100 to 65536) (default 3200)


