Mplayer: sound ok but no image

Problem

Installed Xubuntu with Xfce 4. With mozilla-player the sound is ok, but I have no image.

Journal

20070302

mplayerplug-in problem, sound ok but no image - Ubuntu Forums

Same problem in Ubuntu forums

But I have no "quiet" in my .mplayer config. http://www.apple.com/trailers/ works ok, it's the .asf that doesn't work, for example: mms://cachemedia.omroep.nl/bongo02/0/id/TROS/serie/TROS_1092163/TROS_1125588/bb.20070301.asf

20070713

Installed Ubuntu 7.04

Playing movie still shows no image in Firefox

Press right-mouse button. Choose `Open on movie-player'. Dialog:

The required software to play this file is not installed. You need
to install suitable codecs to play media files. Do you want to
search for a codec that supports the selected file?

The search will also include software which is not officially
supported by Ubuntu.

Choose `Yes'

Select `GStreamer plugins for mms, wavpack, quicktime, musepack' and `Install'

Another dialog:

Restricted Software

The use of some of this software may be restricted in some
countries.  You must verify that one of the following is true:

1. These restrictions do not apply in your country of legal residence
2. You have permission to use this software (for example, a patent license)
3. You are using this software for research purposes only

Choose `OK'

Totem still can't play. Dialog:

The required software to play this file is not installed. You need
to install suitable codecs to play media files. Do you want to
search for a codec that supports the selected file?

The search will also include software which is not officially
supported by Ubuntu.

Select both `GStreamer extra plugins' and `GStreamer ffmpeg video plugin'