I can’t help wrt RealPlayer. I never use it as there are so many other great players available, that will play real media format, plus play many other formats.
If you are new to openSUSE Linux, before trying to fix your sound/multimedia, I recommend you 1st set up your Software Package Manager to make the installation of new and updated software much easier. This is ALWAYS the first thing I do after I have Internet working on a new Linux install.
You can do that in openSUSE by initially adding 4 repositories (repos) to your openSUSE Software Package manager. Those 4 are OSS, Non-OSS, Update and Packman. Just those 4. No others. None (for now). You can add others when you learn more about the risks and problems that can result with other repos. There is guidance for doing that here for openSUSE-11.0: Repositories/11.0 - openSUSE-Community Again, ONLY add OSS, Non-OSS, Update and Packman.
Then once that is done, with your PC connected to the internet, go to YaST > Software > Software management and select for removal xine-lib but do not apply that. Then select for install libxine1 from Packman. Then apply both settings. Then select for installation libffmpeg0 (provides most of the codecs you need) from Packman. For other codecs install w32codec-all, xvid, and libquicktime0 (all from Packman). Also install xine-ui, smplayer. Another useful program to install is vlc. Many users like kaffeine, so you could install the packman version of that (being certain in kaffeine to select the xine engine).
Then try to use either xine, smplayer, vlc, or kaffeine to play your video. Note also that if you have 3D/special desktop effects enabled, it could affect the play back of your videos. Also, the Intel driver does not work well with some Intel graphic hardware, and you may need to do some tuning there.
I know I did not answer your question, but I did not want to leave your post unanswered, and I hope the above helps.
Good luck.