fix h5 for timestamp change (#880)

zhaomingwork

2023-08-21 ca0ada5915b4c71fc4a30db689e0e3646181aebf

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beam_size: 5
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7