codecs, firefox and packageKit

[JD]

My video chip is an ATI mobile radeon 9700 (without TV tuner).

I am getting this message on the cli terminal sometimes:

Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared 
object file: No such file or directory

and it is repeated 3 times

So I looked in my .xsession-errors and found:


** (firefox:1093): DEBUG: OpenURI reply
** (firefox:1093): DEBUG: 0x915c6ac0: "Command 'Play'"
TotemEmbedded-Message: totem_embedded_do_command: Play
** Message: Error: Your GStreamer installation is missing a plug-in.
gstdecodebin2.c(3126): gst_decode_bin_expose (): 
/GstPlayBin2:play/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20:
no suitable plugins found

** Message: Missing plugin: gstreamer|0.10|totem-plugin-viewer|Quicktime 
demuxer|decoder-video/quicktime (Quicktime demuxer)
** Message: PackageKit: xid = 12587089
** Message: PackageKit: Codec nice name: Quicktime demuxer
** Message: PackageKit: structure: gstreamer0.10(decoder-video/quicktime)
** (firefox:1093): DEBUG: 0x915c6ac0: "NewStream mimetype 
'video/quicktime' URL 
'http://www.scififree.tv/unicast_mov/AFTVSciFiH264250.mov'"
** (firefox:1093): DEBUG: 0x915c6ac0: "Not expecting a new stream; 
aborting stream"
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared 
object file: No such file or directory
** Message: PackageKit: Did not install codec: did not agree to search
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared 
object file: No such file or directory

This comes out when I browsed to a freetv web site.

I have all gstreamer codecs installed.
I have all mplayer codecs installed.
So, what plugin do I need to handle the mime type video/quicktime ?
And why is firefox (Or is it packageKit) trying to access 
libvdpau_nvidia.so ?