Tag Archive for 'Ubuntu'

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Persistent IPv6 Address

Published on July 21, 2010 22:41 Tags: , , , , , .

I show you, how to add a secondary IPv6 Address to your existing one.
You need only to edit “vim /etc/network/interfaces” file and add the IPv6 networking configuration.

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# The loopback network interface
auto lo
iface lo inet loopback
 
# The primary network interface
auto eth0
iface eth0 inet static
 address 10.1.100.4
 gateway 10.1.100.1
 netmask 255.255.255.0
 pre-up modprobe ipv6
 post-up ip addr add 2001:470:1f0b:1514::4/64 dev eth0 
 post-up ip route add default via 2001:470:1f0b:1514::1 dev eth0

Another way to do the same:

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pre-up modprobe ipv6
 
iface eth0 inet6 static
 address 2001:470:1f0b:1514::4
 netmask 64
 gateway 2001:470:1f0b:1514::1

Also you can put the ipv6 module in to “/etc/modules” instead of “pre-up modprobe ipv6″

Test it:

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ping6 ipv6.google.com

Some complexe example:

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# The loopback network interface
auto lo
iface lo inet loopback
 
# The primary network interface
allow-hotplug eth0
iface eth0 inet static
        address 188.40.116.234
        netmask 255.255.255.0
        network 188.40.116.0
        broadcast 188.40.116.255
        gateway 188.40.116.206
 
auto eth0:1
iface eth0:1 inet static
        address 192.168.2.70
        netmask 255.255.255.0
 
# IPv6 over tunnel-broker
auto he-ipv6
iface he-ipv6 inet6 v4tunnel
 endpoint   216.66.80.30
 ttl        255
 address    2001:470:1f0a:1604::2
 netmask    64
 mtu        1480
 post-up ip addr add 2001:470:1f0b:1604::1/64 dev eth0
 post-up ip route add ::/0 dev he-ipv6

Convert mp4 to mp3

Published on June 23, 2010 23:38 Tags: , , , .

In this little tutorial I show you how to convert mp4 to mp3.

First method:

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vlc some-video.mp4 --sout '#transcode{acodec=mp2a, ab=96}:std{access=file, dst= "my_new.mp3", mux=ts}'

Second one:

Your copy of FFmpeg needs to be capable of outputting mp3:

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ffmpeg -formats | grep libmp3lame
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ffmpeg -i 2Invention_Lonely_Star.MP4 -acodec libmp3lame -ab 128k 2Invention.mp3

Or a loop for more than one file:

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for f in *.mp4; do ffmpeg -i $f -acodec libmp3lame -ab 128k $(echo $f | sed 's/\.mp4$/\.mp3/'); done




Convert to WAV:

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mplayer -ao pcm 2Invention_Star.MP4 -ao pcm:file="2Invention_Star.wav"

A little convert loop:

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#!/bin/bash
# 
# m4a2wav
# 
for i in *.m4a; do
    mplayer -ao pcm "$i" -ao pcm:file="${i%.m4a}.wav"
done