Which video codec do I need?
- For calls between empathy and empathy, all you need is theora, which is installed by default on all distributions.
- For calls between empathy and gtalk, you need h264 encoder. On ubuntu you can get it by installing gstreamer0.10-plugins-ugly-multiverse and gstreamer0.10-ffmpeg.
To know if a codec is installed, you can use that command:
$ gst-inspect-0.10 | grep 264
Make sure you have encoder and decoder in the list. For h264 you'll have x264enc encoder for example. Similar command can be used for other codecs.
Does Empathy support audio and video chat with Google Talk?
Yes, you can have a audio or video chat on the Gtalk protocol with someone using Gmail's video chat feature, Empathy or Pidgin.
Note that if your contact is using Google Video, be sure he has the latest version of the plugin which can be downloaded from this page.