Which adapter should be installed in a desktop computer to enable recording of a video signal from a video recorder?

To enable the recording of a video signal from a video recorder directly into a desktop computer, a video capture card is specifically designed for this purpose. This type of card allows the computer to receive video input from external sources, such as cameras or video recorders, and convert the analog or digital video signals into a format that the computer can use for recording, editing, or playback.

A video capture card includes the necessary ports and processing capabilities to handle various video formats, ensuring that the video signal can be captured in high quality. It often comes with software that allows users to manage the recording process, offering functionalities such as scheduling recordings, live previews, and editing options.

In contrast, a network interface card is designed for networking and internet connectivity, a sound card handles audio input and output, and a graphics card primarily deals with rendering images and video output to a display, but does not facilitate the capture of incoming video signals. Hence, the video capture card is the most appropriate and effective choice for recording video signals from a video recorder.