Muxer smoothstreaming [Smooth Streaming Muxer]:
    Default video codec: h264.
    Default audio codec: aac.
smooth streaming muxer AVOptions:
-window_size       <int>        E..... number of fragments kept in the manifest (from 0 to INT_MAX)
-extra_window_size <int>        E..... number of fragments kept outside of the manifest before removing from disk (from 0 to INT_MAX)
-lookahead_count   <int>        E..... number of lookahead fragments (from 0 to INT_MAX)
-min_frag_duration <int64>      E..... minimum fragment duration (in microseconds) (from 0 to INT_MAX)
-remove_at_exit    <int>        E..... remove all fragments when finished (from 0 to 1)

