pkt_pts=0|tag:lavfi.silence_duration=0.523107|tag:lavfi.silence_end=0.690023|tag:lavfi.silence_start=0.736417
pkt_pts=46080|tag:lavfi.silence_start=1.27626|tag:lavfi.silence_end=1.80751|tag:lavfi.silence_duration=0.531247
pkt_pts=92160
pkt_pts=138240
pkt_pts=184320
pkt_pts=230400
pkt_pts=276480
pkt_pts=322560
pkt_pts=368640
pkt_pts=414720
pkt_pts=460800
pkt_pts=506880