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想改进这个问题吗 更新问题，使其成为堆栈溢出的主题。

Closed 11 years ago.

使用ffmpeg将flv转换为mp3会得到以下结果



] ffmpeg-0.6.1 >> ffmpeg -i name.flv name.mp3
FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers
built on Feb 14 2011 12:33:38 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
configuration:
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.72. 2 / 52.72. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0.11. 0 / 0.11. 0
[flv @ 0x10869420]Could not find codec parameters (Video: 0x0000)
[flv @ 0x10869420]Estimating duration from bitrate, this may be inaccurate
Input #0, flv, from  name.flv :
Metadata:
audiocodecid : 5
duration : 10
videocodecid : -1
canSeekToEnd : true
Duration: 00:00:10.17, start: 0.000000, bitrate: N/A
Stream #0.0: Video: 0x0000, 1k tbr, 1k tbn, 1k tbc
Stream #0.1: Audio: nellymoser, 8000 Hz, mono, s16
Output #0, mp3, to  name.mp3 :
Stream #0.0: Audio: 0x0000, 8000 Hz, mono, s16, 64 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Encoder (codec id 86017) not found for output stream #0.0

you can see in last line it says codec id 86017 not found. when i run following command:

ffmpeg -formats > ffmpeg-format.txt

mp3 is listed in available formats as
DE mp3 MPEG audio layer 3
.What can be the error.is it that mp3 codec is not properly installed?Help will be appreciated

Answer 1

看起来你的FFMPEG不是用libmp3lame编译的。请参阅此帖子：

https://superuser.com/questions/196857/how-to-install-libmp3lame-for-ffmpeg

如果你不能自己编译它，你将不得不搜索一个支持它的二进制文件。

Answer 2

试试这个，它对我有用。

sudo apt-get安装ffmpeg libavcodec-extra-52

感谢ffmpeg：将纯音频flv转换为swf

Answer 3

对于ubuntu 11.10：

sudo apt-get install ffmpeg libavcodec-extra-53

对于ubuntu 11.04、10.10、10.04：

sudo apt-get install ffmpeg libavcodec-extra-52

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