Re: mp4 video file to mp3 audio file

[ronggui wong <ronggui.wong@gmail.com>]

Dear all,

Thanks for your response. I find that the output is mp2 if I use
ffmpeg -i input.mp4 output.mp3. Of course, I can use lame to further
convert the mp2 file to mp3. How can I achieve the same mp3 by one
command?

I tried add the command mentioned by Sjoerd, but it says "Unknown
encoder 'libmp3lame'", what package should I install to make it works?

Thanks.

Ronggui

On Sun, Jun 7, 2009 at 1:44 AM, Kelly Clowers<kelly.clowers@gmail.com> wrote:
> On Sat, Jun 6, 2009 at 09:14, ronggui wong <ronggui.wong@gmail.com> wrote:
>> Dear all,
>>
>> I have some MTV in *.mp4 format, and I would to convert them to mp3
>> format. What software should I use?
>> I try ffmpeg using ffmpeg -i in.mp4 out.mp3, but it seems something
>> goes wrong as I can not play the out.mp3 with audacious player.
>
> hmmm, I just that same command to get mp3 audio out of
> a mp4/h.264/aac file.
>
> Does ffmpeg giv you info about what it is doing, like this:
>
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'LarryOstermanWin7Audio.mp4':
>  Duration: 00:56:39.79, start: 0.000000, bitrate: 454 kb/s
>    Stream #0.0(und): Video: h264, yuv420p, 320x240, 29.97 tbr, 29.97
> tbn, 59.94 tbc
>    Stream #0.1(und): Audio: aac, 48000 Hz, stereo, s16
> Output #0, mp3, to 'test.mp3':
>    Stream #0.0(und): Audio: libmp3lame, 48000 Hz, stereo, s16, 64 kb/s
> Stream mapping:
>  Stream #0.1 -> #0.0
>
> Have you tried playing the mp3 with mpg123 or mplayer?
>
>
> Cheers,
> Kelly Clowers
>
>
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