If you are finding some difficulty in setting up the GH5 or GH5-S for HDMI output compatibility, please reveiw the following hints ...
- For the GH5 to have access to 60p video, the camera must be in NTSC (59.94 frequency) mode.
- To get the GH5 to output a 10bit 4:2:2 4KUHD60p signal, you must do the following:
- INTERNAL "Rec Quality" is set to 8Bit 4K 150M 60p. This setting can be found under the "Motion Picture Menu."
- "HDMI Rec Output" is set to 10Bit 4:2:2. This setting can also be found under the "Motion Picture Menu."
If either of these settings is not correct, the camera will not output the best quality 10Bit 4:2:2 4kUHD at 60p over HDMI. This is noted at the bottom of page 68 in the GH5 manual.
Another important item needed is a high quality HDMI cable that is capable of handling the bandwidth of a 10Bit 4K60p signal. These cables are generally labeled "2.0a" (though not every 2.0a cable is made well enough to work properly).
- 4Kp60 compatible HDMI Cables are available from Atomos at retail partners, under item numbers ATOM4K60C5, and ATOM4K60C6.
- If the HDMI cable that is being used is not good enough, you will experience signal dropouts and breaks in your recording. An Intermittent connection between the camera and recorder when using a 4K60p output, is almost always caused by using a cable that can not handle the full signal bandwidth.
You can find a setup video for the GH5 and an Atomos recorder at the following link: https://vimeo.com/211830521 (Setup begins at 1:23)
Note: To keep all of the 10Bit data, you can record in the following codec formats...
Apple ProRes HQ
Apple ProRes 422
Apple ProRes LT
Avid DNxHR HQX (4k)
Avid DNxHD 220x (HD)
* (All other available Avid DNx Codecs are 8Bit, DNxHD 36 is a Proxy codec)