自学教程：Python实现批量将MP3音频转为WAV格式详解

pip install ffmpy -i https://pypi.douban.com/simple

#!/user/bin/env python# coding=utf-8"""@project : batch-pro@author  : 剑客阿良_ALiang@file   : audio_tool.py@ide    : PyCharm@time   : 2021-12-21 14:48:18"""from ffmpy import FFmpeg import os  # MP3转wavdef audio_transfor(audio_path: str, output_dir: str):    ext = os.path.basename(audio_path).strip().split('.')[-1]    if ext != 'mp3':        raise Exception('format is not mp3')     result = os.path.join(output_dir, '{}.{}'.format(os.path.basename(audio_path).strip().split('.')[0], 'wav'))    filter_cmd = '-f wav -ac 1 -ar 16000'    ff = FFmpeg(        inputs={            audio_path: None}, outputs={            result: filter_cmd})    print(ff.cmd)    ff.run()    return result  def handle(audio_dir: str, output_dir: str):    for x in os.listdir(audio_dir):        audio_transfor(os.path.join(audio_dir, x), output_dir)

if __name__ == '__main__':    handle('C:/Users/xx/Desktop/test1', 'C:/Users/xx/Desktop/test2')

C:/Users/huyi/.conda/envs/ai_detection/python.exe D:/spyder/batch-pro/audio_tool.pyffmpeg -i C:/Users/huyi/Desktop/test1/1.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/1.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 000001ad059c4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/1.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:08:20.95, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/1.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   15655kB time=00:08:20.95 bitrate= 256.0kbits/s speed= 896x    video:0kB audio:15655kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000487%ffmpeg -i C:/Users/huyi/Desktop/test1/10.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/10.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000021a839a4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/10.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:12:50.25, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/10.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   24070kB time=00:12:50.24 bitrate= 256.0kbits/s speed= 862x    video:0kB audio:24070kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000316%ffmpeg -i C:/Users/huyi/Desktop/test1/2.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/2.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 000002900b784640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/2.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:09:36.24, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/2.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   18007kB time=00:09:36.23 bitrate= 256.0kbits/s speed= 879x    ffmpeg -i C:/Users/huyi/Desktop/test1/3.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/3.wavvideo:0kB audio:18007kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000423%ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 00000238ce244640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/3.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:07:00.73, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/3.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   13148kB time=00:07:00.72 bitrate= 256.0kbits/s speed= 886x    video:0kB audio:13148kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000579%ffmpeg -i C:/Users/huyi/Desktop/test1/4.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/4.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000024ada3a4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/4.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:08:14.58, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/4.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   15456kB time=00:08:14.57 bitrate= 256.0kbits/s speed= 873x    video:0kB audio:15456kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000493%ffmpeg -i C:/Users/huyi/Desktop/test1/5.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/5.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000023e42064640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/5.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:07:08.67, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/5.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   13396kB time=00:07:08.66 bitrate= 256.0kbits/s speed= 850x    video:0kB audio:13396kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000569%ffmpeg -i C:/Users/huyi/Desktop/test1/6.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/6.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000021c487e4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/6.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:06:22.93, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/6.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   11967kB time=00:06:22.92 bitrate= 256.0kbits/s speed= 883x    video:0kB audio:11967kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000637%ffmpeg -i C:/Users/huyi/Desktop/test1/7.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/7.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 000001bd2d4e4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/7.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:08:09.64, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/7.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   15301kB time=00:08:09.63 bitrate= 256.0kbits/s speed= 837x    ffmpeg -i C:/Users/huyi/Desktop/test1/8.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/8.wavvideo:0kB audio:15301kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000498%ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000026043684640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/8.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:08:05.04, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/8.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   15158kB time=00:08:05.04 bitrate= 256.0kbits/s speed= 614x    video:0kB audio:15158kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000503%ffmpeg -i C:/Users/huyi/Desktop/test1/9.mp3 -f wav -ac 1 -ar 16000 C:/Users/huyi/Desktop/test2/9.wavffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 9.3-win32 (GCC) 20200320  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[mp3 @ 0000016a678d4640] Estimating duration from bitrate, this may be inaccurateInput #0, mp3, from 'C:/Users/huyi/Desktop/test1/9.mp3':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    encoder         : Lavf57.71.100  Duration: 00:08:15.12, start: 0.000000, bitrate: 64 kb/s    Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 64 kb/sStream mapping:  Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))Press [q] to stop, [?] for helpOutput #0, wav, to 'C:/Users/huyi/Desktop/test2/9.wav':  Metadata:    major_brand     : M4A     minor_version   : 1    compatible_brands: isomiso2M4A mp42    ISFT            : Lavf58.45.100    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s    Metadata:      encoder         : Lavc58.91.100 pcm_s16lesize=   15473kB time=00:08:15.12 bitrate= 256.0kbits/s speed= 680x    video:0kB audio:15473kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000492% Process finished with exit code 0