View Full Version : [ubuntu] Flash Video > MP3

August 26th, 2009, 11:14 PM
Hello there,

I have some flash video and would like to convert it into an audio file, especially mp3.
How can i go about this? Which program should i use?


August 26th, 2009, 11:20 PM
ffmpeg -i flash_file.flv -ab 128k output.mp3

August 26th, 2009, 11:32 PM
If the Flash video contains MP3 audio you can just copy the stream and avoid re-encoding. This will preserve the quality:

ffmpeg -i input.flv -acodec copy output.mp3
You can see if your flv contains mp3 audio with:

ffmpeg -i input.flv

August 26th, 2009, 11:37 PM
Go to http://code.google.com/p/winff/wiki/UbuntuInstallation and download the .deb from there. It has support for many audio and video formats, a nice friendly gui, and is lightning fast.

August 27th, 2009, 12:00 AM
Hello guys,

Thanks for these amazing replies.
Yet little problem occured:

[flv @ 0xb7ef94c8]Unsupported video codec (7)

Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 25.00 (25/1)
Input #0, flv, from 'test.flv':
Duration: 00:07:41.8, start: 0.000000, bitrate: N/A
Stream #0.0: Video: 0x0007, 25.00 tb(r)
Stream #0.1: Audio: 0x000a, 44100 Hz, stereo
WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
Output #0, mp2, to 'hallucinogen.mp3':
Stream #0.0: Audio: mp2, 44100 Hz, stereo, 0 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Unsupported codec (id=0) for input stream #0.1

What to do?
I follow your instructions but enjoy knowing what i am doing please explain if possible?

August 27th, 2009, 04:31 AM
Looking into file properties i read:

Type: Flash video (video/x-flv)
Codec: H.264/AVC Video

Among other things.

August 27th, 2009, 04:36 AM
Try to downloand HQ version and open it later with avidemux.
Select the mp3 audio codec from the left bar and "Save audio" from menu... :)

August 27th, 2009, 10:01 AM
Ok i managed to fix the issue thanks to this post: http://ubuntuforums.org/showthread.php?t=786095
Following instructions till step 4.

Thanks guys! :)