How to rip the audio from a video?

Question

I am on ubuntu and want to convert a mp4 video to an mp3 audio file but can't figure out how. I tried installing ffmpeg but it failed to encode the mp3. I've read the gstreamer does it but I can't figure out how. I have gstreamer and python installed. I can program with python, but am not super comfortable compiling software from source or any higher level command line stuff. I only know the basics on the command line.

"it failed to encode the mp3". Way too vague. `ffmpeg` can do it. Please tell us what command you tried, and what error you got. — Matthew Flaschen, Mar 31 '11 at 21:40
Why don't you first learn how to do it manually, with ffmpeg from the command-line, and then either fire a process from python to call ffmpeg, or use it as a library? — salezica, Mar 31 '11 at 21:49
in order to get ffmpeg to work, I would need to build it from source to work with lame, but I don't have the technical skills required to do that. So I am looking for an alternative method that doesn't require building software from source. — lovefaithswing, Apr 01 '11 at 15:22
I didn't include the ffmpeg error because I understand the error. — lovefaithswing, Apr 01 '11 at 15:22

score 3 · Answer 1 · answered Mar 31 '11 at 22:15

mplayer <videofile> -dumpaudio -dumpfile out.bin

it will copy the raw audio stream, that should then be easily converted using sox, lame, vlc or whatnot. VLC has nice conversion options as well - and it sports a GUI. I don't know about extracting just the audio, but it should sure be capable of it

score 1 · Answer 2 · answered May 16 '11 at 13:02

1

Use TAE https://github.com/tuna74/TunaAudioExtracter. It does everything you want.

answered May 16 '11 at 13:02

Andreas Tunek

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score 0 · Answer 3 · edited Jul 27 '16 at 19:37

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hmm, for an easy python solution, you could always checkout the python video converter, on https://pypi.python.org/pypi/video-converter a sample code is as follows:

    from converter import Converter
    c = Converter()
    conv = c.convert('g.mp4', 'clip5.mp3', {'format':'mp3','audio':{'codec': 'mp3','bitrate':'22050','channels':1}})
    for timecode in conv:
        pass

where clip5.mp3 is the name of the output file,

edited Jul 27 '16 at 19:37

Ben Aubin

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answered Oct 31 '15 at 07:02

programmer44

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I am getting an error `no module named converter` even after installing it using pip. – Riken Shah Sep 11 '16 at 09:38
@raptor96 it is important that you use pypi, unpack the thing and install it from there, pip actually refers to a different library, – programmer44 Sep 12 '16 at 20:56
Still same error, downloaded from pypi, unzipped and installed it and it says `no Module named Converter` – Riken Shah Sep 13 '16 at 11:52

score 0 · Answer 4 · answered Nov 03 '15 at 20:59

Easiest way to do this using GStreamer is to create GStreamer pipeline with decodebin element using gst-launch command-line utility:

gst-launch-1.0 filesrc location=in.mp4 ! decodebin ! audioconvert ! lamemp3enc ! filesink location=out.mp3

In case your mp4 file contains audio track in mp3 format you may want to avoid re-encoding:

gst-launch-1.0 filesrc location=in.mp4 ! qtdemux ! audio/mpeg ! filesink location=out.mp3

If you want to use FFMPEG, you can use following command:

ffmpeg -i in.mp4 out.mp3

You can avoid re-encoding (in case audio track is in mp3) with -acodec copy option:

ffmpeg -i in.mp4 -acodec copy out.mp3

How to rip the audio from a video?

4 Answers4

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