I run these apps on windows...thinking of a move from windows to linux.
but i need following on linux to work
1.virtualdub
2.h.264 codec + mp3 codec
3.Videoredo Suite
4.ComproTV PVR
As far as Linux codec .. Linux has its own codecs known as gStreamer and Xine. You can choose any one of them. Gstreamer support Gnome while Xine support KDE.. So it depends on the Desktop Manager you use
MythTV This will do your PVR and Videoredo work I guess or check this OS with Myth TV pre-installed | Mythbuntu