Yes MPEG2 (and option of MPEG1 on Hauppauge cards PVR cards).
The only exceptions are:
- digital devices devices creating recordings of non-MPEG2 streams - for example, the new MPEG4 digital TV services that are starting to appear in some parts of the world.
- GO7007SB devices with hardware divx encoders creating .avi files, but these devices are pretty crappy and no longer officially supported.