pts=0|tag:lavfi.silence_duration=0.523107|tag:lavfi.silence_end=0.690023|tag:lavfi.silence_start=0.736417
pts=46080|tag:lavfi.silence_start=1.276259|tag:lavfi.silence_end=1.807506|tag:lavfi.silence_duration=0.531247
pts=92160
pts=138240
pts=184320
pts=230400
pts=276480
pts=322560
pts=368640
pts=414720
pts=460800
pts=506880
