Using the correct card and software (Media Express?) can I encode two HDMI 1080P 30HZ signals simultaneously to make two separate MP4 files? If so, what card and software package should I purchase?
Yes, you can! The DeckLink Quad HDMI Recorder supports 1080p30, and you can use my free software to do this on windows.
HiTech Playout is a full-featured, free 8-channel standard SD/HD/UHD playout and recorder. Link: https://forum.blackmagicdesign.com/viewtopic.php?f=14&t=203230