FC4: no more video thumbnails

[Colin Brace]

Since upgrading from Core 3 to Core 4 last month, I've noticed that 
thumbnails of videos are no longer being generated in Nautilus folders. 
The clock icon is shown for a few seconds and then the default .avi icon 
is displayed.

The Nautilus setup page is configured to create thumbnails for files up 
to 1G. JPG and PNG thumbnails work fine. Nautilus also displays the 
thumbnails for video files it created under FC3.

Some video codec must be missing. But which? I have all the usual 
suspects installed: gstream, xine, mplayer. Any ideas?...

-- 
  Colin Brace | cb at lim.nl
  Amsterdam
  http://www.lim.nl