Finally got my GoPro 5 working with the ATEM TVS HD

TL;DR used a $20 HDMI Pass-Through EDID Emulator

I'd seen quite a few posts on this forum where people were having trouble trying to get GoPros working with other versions of the ATEM, but hadn't seen any for the new ATEM Television Studio HD. So I went ahead a bought one anyway (hoping for the best). Unfortunately I discovered that while it worked fine with my GoPro Hero 5 at 720p60 and 1080p30, it just presented a black screen at 1080p60.

After a bit of research, I concluded that it must be something to do with the EDID that the ATEM was sending out the HDMI, and the way the GoPro was interpreting it. Since I'd already sunk a few thousand dollars into gear, I thought I'd give some cheap EDID pass-thru emulators a go that I found on aliexpress. And what do you know, they totally worked!

My theory about why this works is that the ATEM is not actually sending out resolution/framerate info on the EDID, and so the GoPro plays it safe and goes for 1080p30. But the emulator sends out a whole lot of different resolutions ranked in order of bitrate. The GoPro uses the highest setting in the list that it can output to which just happens to be 1080p60!

Anyway, whatever. I'm just really glad it works now, and hope this will be helpful to someone else in the same position as me!

EDID emulator with GoPro and ATEM.jpg (94.2 KiB) Viewed 1873 times

How these passive tiny emulators work is still not clear to me.
I have a good old GoPro Hero 3+ Silver that worked fine at 1080i50 with the original ATEM TVS, but no longer works with the TVS HD when set to 1080i50 (and for my purpose, 1080p50 is not okay).
I assume that the TVS HD, even when set to 1080i50, still negociates 1080p50 with the GoPro.

So by reading threads here an there, I guess a EDID emulator would do the trick, but do I need a programmable thing like €80+ Lindy or Doctor HDMI device, or will a <€20 passive Lindy or equivalent do ? How does the passive EDID emulator work to force 1080i50 to the GoPro ?
I'd like to understand how this really works before ordering....

Hdmi sources negotiate with sinks (displays). The display has an eeprom (EDID) which contains a list of supported video modes. The source then chooses the best one from the list.

The EDID emulator provides a selectable but restricted list , thus forcing the source (gopro) to use a particular mode. The HDMI signal then passes through to the destination.

It would be nice if the hdmi to sdi microconverters had such functionality built in , but I don't think they do , so the source seems to default to something (some devices are configurable , some not ). So you can be lucky or unlucky depending on the source device.

In the case of the HD studio pro , I thought the hdmi inputs EDID are set based on the switcher resolution - but perhaps not.

Hope that explains.

Just as a follow up , I have an EDID with a switch to select the mode. I guess the original poster got lucky with his fixed edid emulator.

Just as a follow up , I have an EDID with a switch to select the mode. I guess the original poster got lucky with his fixed edid emulator.

Yes, by watching photos of the simple "dongle" emulators, I don't see any switch so wonder how these work ?

The purpose of the switchless dongle emulators is for headless PCs.
The original poster got lucky because the negotiated resolution matched what he needed.

That wouldn't work for me , because I use 1080p50.

I'm not going to give links , but there are a few units with switches on amazon for around £10-£25.