nov

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Posted by : admin | On : 11 novembre 2014

 

tested in version opensuse 13.2

download the rpm on google music

then execute the command line

sudo zypper in google-musicmanager-beta_current_x86_64.rpm source https://www.alionet.org/content.php?415-Skype-dropbox-google-earth-google-musicmanager-sur-openSUSE-12-3-RC1

Extract mp3 from flv

Tonight I tried to rip the audio track from a flv file. First I wanted to convert it into ogg but as the audio track is a mp3 stream itself I decided just to rip the mp3 data into a file (same quality as in the video file. A higher samplerate would only increase filesize).

UPDATE: Today the audiostream is often aac (not mp3 anymore). That means, you have to use mp4 instead of mp3 with ffmpeg … -f mp4 … .mp4).

One of those commands will do the job:
mplayer -dumpaudio in-video.flv -dumpfile out-audio.mp3
ffmpeg -i input.flv -f mp3 -vn -acodec copy output.mp3

To convert all files (*.flv to *.mp3) in the directory use one of the following commands:
for i in *.flv; do mplayer -dumpaudio -dumpfile « ${i/.flv} ».mp3 « $i »; done
for i in *.flv; do ffmpeg -i « $i » -f mp3 -vn -acodec copy « ${i/.flv} ».mp3; done

#ffmpeg: -f mp3 => force mp3 format, -vn => novideo, -acodec copy => stream-copy
# ${i/.flv} is cutting the filename $i from « .flv »

UPDATE: As the files are not always in the same format and my portable music player couldn’t play mp4 I decided to convert them to ogg.
ffmpeg -i input.flv/mp4 -vn -acodec vorbis output.ogg

This script will transform all flv files in your directory into mp3 files.

1. Create a new file e.g. with kate and name it flv2mp3.sh

#!/bin/bash
for i in *.flv
do
echo « $i »
# Alternative 1
# mplayer -dumpaudio -dumpfile « ${i/.flv} ».mp3 « $i »
#Alternative 2
ffmpeg -i « $i » -f mp3 -vn -acodec copy « ${i/.flv} ».mp3
done

2. Change the right of this file:
chmod +x flv2mp3.sh

3. Goto the directory and run the script