Blackmagicdesign H.264 Pro Recorder Operation Manual page 22

Connection Reference Guide
22
S-Video Analog Connections
H.264 Pro Recorder's analog video BNC connectors can be used for S-Video analog video capture
in standard definition. While some analog decks provide S-Video Y and C ports using two BNC
connectors, other analog equipment uses a single S-Video connector. A simple S-Video to dual BNC
adapter cable (not included) can be used for S-Video capture as illustrated below.