Today Panasonic released the firmware update program for Lumix S1H RAW video data output over HDMI based on their announcement from September last year (just like the Nikon Z6/Z7 cameras):
“Developed together with ATOMOS, Ver2.0 firmware enables the output of max. 5.9K/29.97p and 4K/59.94p RAW (C4K 4128 x 2176 [DCI] 17:9 or 3.5K Anamorphic 4:3) video data over HDMI to an Atomos NinjaV, where it can be monitored and saved as Apple ProRes RAW. ”
The new firmware will be available on May 25th. Additional information: