I am having the same problem here. I am running ATI 650 on a Windows XP SP2 and the latest build of Mediaportal, SVN, and TVE3 as of August 5th, 2007. When running the TV3 server I have audio, but not video; however, if I record a tv program and play back the recording I get both video and audio.
If I uninstall the plugin and run the regular client only without the TVServer everything works fine, both video and audio.
If I uninstall the plugin and run the regular client only without the TVServer everything works fine, both video and audio.