今天总结一下常用的linux音频处理工具
soX - Sound eXchange
soxi
soxi 常用选项soxi: SoX vUsage: soxi [-V[level]] [-T] [-t|-r|-c|-s|-d|-D|-b|-B|-p|-e|-a] infile1 ...-V[n] Increment or set verbosity level (default is 2)-T With -s, -d or -D, display the total across all given files-t Show detected file-type-r Show sample-rate-c Show number of channels-s Show number of samples (0 if unavailable)-d Show duration in hours, minutes and seconds (0 if unavailable)-D Show duration in seconds (0 if unavailable)-b Show number of bits per sample (0 if not applicable)-B Show the bitrate averaged over the whole file (0 if unavailable)-p Show estimated sample precision in bits-e Show the name of the audio encoding-a Show file comments (annotations) if availableWith no options, as much information as is available is shown foreach given file.查看音频信息
用法格式：soxi file.wav例：soxi D8_999.wavInput File : 'D8_999.wav' # 文件名Channels : 1 # 通道数：常用有单声道，双声道等Sample Rate : 16000 # 采样率：常用有8000Hz，16000Hz等Precision : 16-bit # 采样位深：常用的有 8-bit, 16-bitDuration : 00:00:08.06 = 129000 samples ~ 604.688 CDDA sectorsFile Size : 258kBit Rate : 256kSample Encoding: 16-bit Signed Integer PCM播放音频
用法格式：播放一遍 play file.wav播放n遍 play file.wav repeat n例子：play D8_999.wavD8_999.wav: File Size: 258k Bit Rate: 256k Encoding: Signed PCM Channels: 1 @ 16-bit # 通道数以及采样位深Samplerate: 16000Hz # 采样率Replaygain: off Duration: 00:00:08.06In:100% 00:00:08.06 [00:00:00.00] Out:356k [ | ] Clip:0Done.修改音频采样率
用法格式：sox inout.wav -r samplerate output.wav例：sox D8_999_before.wav -r 8000 D8_999_after.wavsoxi -r D8_999_before.wav16000soxi -r D8_999_after.wav8000将pcm文件转化为wav文件
用法格式：sox -t raw -c [channal] -e signed-integer -b [bits] -r [samplerate] [input.pcm] [output.wav]-t|--type FILETYPE File type of audio-c|--channels CHANNELS Number of channels of audio data; e.g. 2 = stereo-e|--encoding ENCODING Set encoding (ENCODING may be one of signed-integer, unsigned-integer, floating-point, mu-law, a-law, ima-adpcm, ms-adpcm, gsm-full-rate)-b|--bits BITS Encoded sample size in bits-r|--rate RATE Sample rate of audio例：sox -t raw -c 1 -e signed-integer -b 16 -r 16000 D8_999.pcm D8_999.wav将D8_999.pcm文件转化为D8_999.wav通道数为1采样位深为16-bit采样率为16000Hzffmpeg - 音视频转换工具
视频中提取音频
用法格式：ffmpeg -i video.mp4 -ar 16000 -ac 1 audio.wav截取一段音频
用法格式：ffmpeg -i input.mp3 -ss [start_time] -to [end_time] -c copy output.mp3[start_time]/[end_time]格式：00:00.00 or 00:00
