stvmpegin.dll is a mpegin
belonging to SageTV® MPEG File Decoder
from MainConcept AG
Non-system processes like stvmpegin.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.