Comments on: Tech tip #3: Rip audio from an .FLV file.

By: Dion Moult

Dion Moult — Fri, 12 Aug 2011 11:10:33 +0000

eliasp, a recent test found that the method I posted seems to give a higher quality mp3 than yours.

By: anon

anon — Wed, 05 Aug 2009 01:11:26 +0000

The audio stream in .flv are already in mp3 format. So you can just do following command
mplayer -dumpaudio foobar.flv
and have a resulting stream.dump file which you can rename to foobar.mp3 (this works the same way for .wmv to .wma and .mp4/.f4v to .aac). No unnecessary re-ecoding so it keeps the quality and is faster to boot.

By: hessiess

hessiess — Tue, 28 Jul 2009 01:41:58 +0000

When going from a already lossy source, and encoding into a lossy format you will only degrade the quality of the audio even more. Thus it would be better to use a lossless format like FLAC or even WAV to prevent further degrading the audio quality.

By: Blah

Blah — Sat, 25 Jul 2009 17:26:17 +0000

ffmpeg -i foobar.flv -vn -acodec vorbis -aq 50 -ac 2 flavor.ogg

-vn no video
-aq audio quality (vorbis specific ~ values 1-100)
-ac audio channels
-acodec audio codec

By: hari

hari — Sat, 25 Jul 2009 02:27:32 +0000

This is a shameless promotion, but do you know about my app BiaMovE, which is a mencoder GUI I wrote – it has most of the options of mencoder without dumbing down them and I use it myself for ripping DVDs or audio/video conversion.

Take a look: http://harishankar.org/software/biamove.php

By: Dion Moult

Dion Moult — Sat, 25 Jul 2009 01:47:24 +0000

@eliasp: Whoops :) and thanks!

By: eliasp

eliasp — Fri, 24 Jul 2009 17:33:02 +0000

Shorter and easier to remember:
ffmpeg -i foo.flv bar.mp3