Amazon.com: HDMI to SDI Converter, Micro Converter One HDMI in Two SDI Output (with Power Supply Adapter, Audio Embedder Support HDMI 1.3, 3G/HD- SDI Auto Format Detection Extender for Camera CCTV : Electronics
Blackmagic HDMI / SDI 12G - Bi-Directional with power supply - BMD-CONVBDC/ SDI/HDMI12G/P - Micro Converter 12G