Installing suggested codec doesn't play the file

I was sent a wmv file, so decided to test Gnome-app-install on my Gutsy Tribe 5 install.

I double-clicked it and Totem popped up. It tells me that it doesn't have the necessary codecs and I tell it to search.
The video is Windows Media Video 9 and audio is Windows Media Audio 8.

It returns two results:
Gstreamer extra plugins; and
Gsreamer ffmpeg video plugin.

I click the top one, as a novice would do (it has a much higher popularity), and it installs Gstreamer extra plugin. It all installs and I close the installation window.

Focus returns to Totem and I am told that I do not have the required codecs. Clearly something has gone wrong.

If I install the second option, I can play the file. My concern is that the really nice, easy-to-use process didn't work properly.

I'm trying to narrow the cause so that I can file a bug report.

My two guesses are that:
- gai only searches for things that play wmvs, without checking the versions that they can play; or
- GStreamer extra plugins supports either the video, or sound, but not both.

The second option creates an interesting thought. Perhaps we should be splitting the gai codec interface into audio and video. The same screen could appear, with two lists; one with a list of codecs to play the video, one with a list to play the audio.