Last week, I installed opensuse 12.3 and encountered the following problem with VLC:
main decoder error: no suitable decoder module for fourcc `mpgv’. VLC probably does not support this sound or video format.
I had this for about any video format (mpgv for a DVD in this case). Turned out it is a package problem. Simply install vlc-codecs and you should be good to go.
Update: apparently, this is not a bug, but a feature, see
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