Notices

hmm, here it says:
E: Couldn't find package libmp3lame

[QUOTE=HtheB;885714]Are you sure you did the right command?
change input.mp4 into the downloaded youtube filename (watch it, it's case sensitive)

and change the output into a name without spaces, like
Music-TrackName.m4a

you can change the name from the File Manager .
Hope this will help![/QUO

I have now managed to convert them to an "ACC" format and got that to play on the standard media player but I have still had no success with the m4a format. Yesterday the media player said "format not recognised". After a re-boot the song loads but never plays!

Just been messing about and managed to create a batch file script using ffmpeg. The script also takes into account spaces in file names.

So now you can take all those .mp4(.flv) that youve got saved in a single folder, strip out the video and be left with the sound file.

#!/bin/sh
for m in *.mp4 ;
do FILE=${m%%.mp4};
ffmpeg -i "$FILE.mp4" -acodec copy -vn "$FILE.m4a"
done

haven't read all the posts but there is an app called Pymp that does what your looking for

Not used Pymp but cheers for the tip. Seems like you need to be online to use it, which using the script doesnt.

Converting to mp3 you will also lose some sound quality, while the script retains the original sound file by splitting it from the video.

E:Couldn't find package libmp3lame

can someone help me please?

try libmp3lame-dev
also, it's in extra-devel, so usual warning apply.

or you can try libmp3lame0.

I have same problem, as anapospastos. During converting to mp3, I got message "unknown encoder"

Well that site is already banned

Take http://linktomp3.com/ as an alternative my friend