update README (#2106)

zhifu gao

2024-09-25 4294d2166ebcf560e9e2ccb5c8454fa4973f061d

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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