avidavdvcodec.qtx is a AvidAVdv
belonging to Avid DV25 and DV50 Component
from Avid Technology, Inc.
Non-system processes like avidavdvcodec.qtx 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.