fix error:reference before assignment for write_flag when using kaldi_ark (...

Marlowe

2023-09-01 c29e5071bdb0dea46a7778f3a8a08692458f19f1

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wget https://isv-data.oss-cn-hangzhou.aliyuncs.com/ics/MaaS/ASR/dep_libs/ffmpeg-N-111383-g20b8688092-linux64-gpl-shared.tar.xz
tar -xvf ffmpeg-N-111383-g20b8688092-linux64-gpl-shared.tar.xz