why ubuntu don't have any media codec?

I've tried to find a solution to this but haven't been able to yet.

I'm using ubuntu 12.04 installing using wubi installer.

I have no audio. I can see the sound icon on the bar on top and interact with it. It doesn't say mute, it seems normal.

hi all i have question how to convert and extract audio from video file, i have try avconv but it says the codec was unknown i also write -acodec mp3 libx264 h264 and other codec but but the avconv always says unknown codec and so the winff, winff however can convert to wma or audio file but its corrupted, am i should download the codec?

I have a very slow internet connection so therefore I'd like to use the G729 audio codec with Linphone and Voipbuster (actually I'd prefer to use Ekiga but this isn't available for Quantal Quetzal 12.10 and has no G729). Apparently it should be possible to use G729 with Linphone, see here. I downloaded the tar.gz file and followed installation instructions.

Goodmorning,

Here is the update for previous Vista Codec Package. This is Vista Codec Package 5.6.9. This new release include some update like: update gabests filters 184,update ffdshow 3406 and some important updates. Basically, few times ago, I have so many trouble with codecs, to play some multimedia file on my Windows box.

I'm not sure if this forum is the best place to post this, but I'm having a problem with VLC, and I figured I'd start my search for a fix here. Basically, I have a video in .mkv format, and upon playing it in VLC, I get audio but the video is just a blank green screen. Does anyone know of any problems like this with VLC? As far as I know, I have the latest version of the player.

I have a question regarding the ability (or lack thereof) to play certain .wma files in openSUSE 11.2

I wnated to get Opus audio codec running in my ubuntu 12.04 Precise.

As libopus0 and libogg0(1.3.*) where not available in repository I went ahead and downloaded, compiled and installed

libopus 1.1 & opus-tools from http://www.opus-codec.org/downloads/

And

libogg 1.3 from http://www.xiph.org/downloads/

Then compiled ffmpeg from the source after downloading from the official sit

Hi I updated a friends computer from 11.10 to 12.04 and the sound stopped working in the built-in speakers. The computer is a Sony Vaio PCG-2J1L.