好的,为ffmpeg做了标准的hoembrew安装。
所有看起来都很酷,我猜测必须包含mpeg编解码器,但我仍然得到一个0字节的文件和错误信息:
输出流#0:0
找不到编码器(编解码器mp3)帮助大多数人赞赏。
ffmpeg -i input.mp3 -b:a 48k -ar 16000 output.mp3
ffmpeg version 3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with Apple LLVM version 7.3.0 (clang-703.0.29)
configuration:
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
[mp3 @ 0x7ff05a010600] Skipping 0 bytes of junk at 626.
Input #0, mp3, from 'input.mp3':
Metadata:
title : Allegro from Duet in C Major
Duration: 00:00:59.56, start: 0.025057, bitrate: 192 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
Metadata:
encoder : LAME3.96r
Output #0, mp3, to 'output.mp3':
Metadata:
title : Allegro from Duet in C Major
Stream #0:0: Audio: mp3, 0 channels, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (mp3 (native) -> ? (?))
Encoder (codec mp3) not found for output stream #0:0
答案 0 :(得分:1)
这最终起作用:brew install --use-clang --HEAD ffmpeg