Non-Free and Contrib Packages in Debian

I installed Debian’s vrms package a few weeks back, and completely forgot about it until I received an email earlier today:

Subject: Cron  test -x /usr/sbin/anacron || 
( cd / && run-parts --report /etc/cron.monthly )

/etc/cron.monthly/vrms:
              Non-free packages installed on tolstoi

acroread Adobe Acrobat Reader: Portable Document Format file vi
acroread-data data files for acroread
acroread-dictionary-en English dictionary for for acroread
acroread-l10n-en English language package for acroread
dvdrtools DVD writing program
firmware-linux Binary firmware for various drivers in the Linux kernel
firmware-linux-nonfree Binary firmware for various drivers in the Linux 
                       kernel
firmware-ralink Binary firmware for Ralink wireless cards
p7zip-rar non-free rar module for p7zip
rar Archiver for .rar files
sun-java6-bin Sun Java(TM) Runtime Environment (JRE) 6 (architecture
sun-java6-fonts Lucida TrueType fonts (from the Sun JRE)
sun-java6-jre Sun Java(TM) Runtime Environment (JRE) 6 (architecture
sun-java6-plugin The Java(TM) Plug-in, Java SE 6
ttf-xfree86-nonfree non-free TrueType fonts from XFree86
w64codecs win64 binary codecs

               Contrib packages installed on localhost

flashplugin-nonfree Adobe Flash Player - browser plugin
ttf-mscorefonts-installer Installer for Microsoft TrueType core fonts

I don’t have many non-free packages installed, and I have yet to find better - or more open - alternatives to rid my system completely of such packages: Adobe and Sun Java are required for work; and the codec package is simply too comprehensive to ignore.

Extract Audio from FLVs on Hard-drive

FFmpeg can extract the audio from FLVs without re-encoding to preserve the quality.

If you don’t already know what type of audio is in the file, do :

$ ffmpeg -i inputfile.flv

Along with some other data, it will tell you about the audio:

Stream #0.1: Audio: mp3, 22050 Hz, mono, s16, 56 kb/s

As mp3 audio was used (which is usually the case in FLVs), perform the following command to extract it to output.mp3:

$ ffmpeg -i inputfile.flv -acodec copy output.mp3

Alternatively, for aac audio streams, you can use:

$ ffmpeg -i inputfile.flv -acodec copy output.**aac**