小编elp*_*elp的帖子

我可以将这种格式之一转换为兼容的16000.0 采样率 FLAC文件吗？

kAudioFormatLinearPCM                   = 'lpcm',
kAudioFormatAppleIMA4                   = 'ima4',
kAudioFormatMPEG4AAC                    = 'aac ',
kAudioFormatMACE3                       = 'MAC3',
kAudioFormatMACE6                       = 'MAC6',
kAudioFormatULaw                        = 'ulaw',
kAudioFormatALaw                        = 'alaw',
kAudioFormatMPEGLayer1                  = '.mp1',
kAudioFormatMPEGLayer2                  = '.mp2',
kAudioFormatMPEGLayer3                  = '.mp3',
kAudioFormatAppleLossless               = 'alac'

我尝试使用 ffmpeg

ffmpeg -i audio.xxx -acodec flac audio.flac

但结果是

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0 …