Muxer hls [Apple HTTP Live Streaming]:
    Common extensions: m3u8.
    Default video codec: mpeg2video.
    Default audio codec: mp2.
hls muxer AVOptions:
-start_number      <int64>      E..... set first number in the sequence (from 0 to I64_MAX)
-hls_time          <float>      E..... set segment length in seconds (from 0 to FLT_MAX)
-hls_list_size     <int>        E..... set maximum number of playlist entries (from 0 to INT_MAX)
-hls_wrap          <int>        E..... set number after which the index wraps (from 0 to INT_MAX)

