Could I Choose SDI IN HDMI Out or HDMI IN SDI Out? Hollyland Tech November 27, 2020 10:03 Updated Since the MARS 400S PRO has both the SDI and HDMI interface, it will be more convenient for the user to choose either the single way or the mixed way. The system could work as the " HDMI-SDI" Converter. Transmitter : Receiver ： Related articles Why I can’t get the video format on the OLED screen ? What is the AUTO mode? How to add my own LUTs to HollyView App? How to get the best wireless performance with MARS 400S PRO? Issue: Unable to find the device Wi-Fi Comments 0 comments Article is closed for comments.