Extract audio from video file

Since there are so many tools (Minitube, youtube-dl) which allows you to download video files from YouTube or other video sharing sites, let’s go one step further and extract the sound from the downloaded video file to a mp3 file.

The FFmpeg tool will do the trick just fine. Thus assuming that you have the video file “My Video File.mp4” and you want to extract  the sound into “My Sound File.mp3 ” use the following command:

ffmpeg -i "My Video File.mp4"  -ab 128 "My Video File.mp3"

With the “-ab 128” parameter you specify that the audio bitrate should be 128k. Additionally the “-ar” parameter may be used for the audio sampling frequency but by default it is set to 44100, which should be ok.

On Ubuntu it may be necessary to add the Medibuntu repository and install the libmp3lame codec. For FFmpeg the audio codec can be specified using the parameter “-acodec”.

Using multiple yahoo accounts at the same time

If you have more than Yahoo accounts and you want to use them in the same time, there is a simple way to do it, by using an alternative instant messenger client or by executing some small tweaks on the Yahoo Messenger client.


Alternatives to the Yahoo Messenger client are Pidgin, Miranda or Trillian. You can open as many accounts as you want with Pidgin, which is free and open-source, has lots of useful plugins.

Tweaking the Yahoo Messenger client:

You need to add a key in the windows registry. Just follow the images step by step.

  • Go to START -> Run type regedit, press OK.
    start run regedit
  • In the Registry Editor window, double click on the HKEY_CURRENT_USER.
    regedit hkey_current_user
  • Double click on Software.
    regedit hkey_current_user software
  • Dublu click on Yahoo.
    regedit hkey_current_user software yahoo
  • Double click on pager.
    regedit hkey_current_user software yahoo pager
  • Single click on Test (or test).
    regedit hkey_current_user software yahoo pager test
  • On the right column of the window, right click somewhere below Default, and select New -> DWORD Value.
    regedit dword value
  • A new element will be created; rename it plural.
    regedit redenumeste plural
  • Dublu click on plural; in the new window set Value data to the maximum number of Yahoo Messenger windows you want to be opened at the same time (if you set it to 10 – you will be able to open 10 Yahoo Messenger windows simultaneously).

That’s all. Close Registry Editor and try to open more Yahoo Messenger windows.