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ret: 0         st:-1 flags:0  ts:-1.000000
ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:     32 size:  1024
ret: 0         st:-1 flags:1  ts: 1.894167
ret:-EOF
ret: 0         st: 0 flags:0  ts: 0.788330
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ret:-1         st: 0 flags:1  ts:-0.317494
ret:-1         st:-1 flags:0  ts: 2.576668
ret: 0         st:-1 flags:1  ts: 1.470835
ret:-EOF
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ret:-1         st: 0 flags:1  ts:-0.740834
ret:-1         st:-1 flags:0  ts: 2.153336
ret: 0         st:-1 flags:1  ts: 1.047503
ret:-EOF
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ret: 0         st: 0 flags:1  ts: 2.835848
ret:-EOF
ret:-1         st:-1 flags:0  ts: 1.730004
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ret: 0         st: 0 flags:1  ts: 2.412507
ret:-EOF
ret:-1         st:-1 flags:0  ts: 1.306672
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ret: 0         st: 0 flags:1  ts: 1.989167
ret:-EOF
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ret:-1         st:-1 flags:1  ts:-0.222493
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ret:-EOF
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ret:-1         st:-1 flags:1  ts:-0.645825