The function of DV video capture card is to capture video signals into the computer and save them on the hard disk in the form of data files. It is an essential hardware device for video processing.
HD video capture card, also known as audio and video capture card, is a computer external device, mainly used to input video and sound signals into the computer for editing, compression and storage.
High-definition capture cards are primarily used to receive and convert video signals from surveillance cameras for display, storage, and processing on computers or display devices.