What Digital Encoders Exist?

Have a GoPro with HDMI output just itching to be used as a security camera.

Does anyone know of a HDMI to IP H.264 (ONVIF) encoder?

Found this one, its a encoder and decoder in one, ONVIF, POE, 1080P/60, HDMI/SDI input, but it's not cheap. (>$500??) Plus I've never heard of the mfr, Antrica, maybe they are more broadcast video?

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