117	StartTime        float64
118	StartTimePrecise bool
119	durationAsInt    bool // output durations as integers of floats?
120	keyformat        int121	winsize          uint // max number of segments displayed in an encoded playlist; need set to zero for VOD playlists
122	capacity         uint // total capacity of slice used for the playlist
123	head             uint // head of FIFO, we add segments to head