Forum Discussion
Yealink HDMI ingest - lag and call failure
1. Rooms with 4K screens and Extron CTL-100 workplace controllers. MTR system manually set to 1920x1080 res. EDID on CTL-100's to be checked and changed to 1080p if required.
2. Rooms with 4K screens and pass-though 1080p EDID emulators in-line between MTR system and screen. MTR system set to 1920x1080 res (which unsurprisingly Windows reports as 'Recommended')
3. Rooms with 4K screens MTR system directly connected to screens. MTR system manually set to 1920x1080 res.
One observation is that even after hard-coding the MTR systems without CTL-100 or EDID emulators to 1920x1080 (scenario 3), the screens were still reporting a 4K signal. This is unexpected. I trust the screens, they are commercial Panasonic displays.
I am also promoting the use of Teams Cast to our users as an alternative method of screen sharing.
Nice. Let us know how it goes!!!.
I always say that the monitor is the boss in the system when it comes to resolution. We always need to use pass through EDID emulators to be able to set the 1080p resolution, and have it to stay there. Otherwise the monitors will "override" the system and it changes back to 4K/UHD. System needs to tell the monitors what they will get. Not the other way around :).
I know that Crestron actually and always includes a EDID emulator in all of their MTR systems they sell. Just because they know about these issues, and they tell us that they don´t support problems that occur if you don´t use it while setting up their hardware.
But i still can´t figure out why it works for internal staff, and not for external visitors.
- As Teams Cast was delayed and has only just been reactivated for us we're only now about to begin testing Cast as an alternative to HDMI ingest in our rooms
- Whether the user is external or internal to your tenancy should not matter. This is a pure hardware-level connection. I would take note of the model of laptop that is connected, What you might be finding is that the guest laptop is trying to output at 4K and the ingest then has to convert to 1080p. Keep in mind the EDID emulator is telling the front of room display what resolution to set to, it has no bearing on the ingest resolution.
I would try and do some testing with different laptops and see what the HDMI output is trying to send. This may help you pinpoint what is going on. - Yes, I think it is very strange. The customer has bought 800 Lenovo Carbon x1 Gen.9 laptops. But i have not myself checked what the external visitors have. I know that Microsoft up till a few days ago had som really big issues with not being able to call or invite external people directly from the MTR. So i had a thought if that was connected. Just because both problems was connected to external users. But we will install EDID Emulator and i think ours cost around 60Euro Each (The same one that Crestron uses for there MTR kits.) . Just to see if it makes a difference.
The only thing i can find from Microsoft or Yealink on this problem is the resolution issues. But i think that it would affect ALL users.
And i will also try to see this first hand to be able to look through the external computer and see if there is something there that causes this. I know that the CPU can rise very high when hosting a meeting and presenting at the same time. But i think that it should be able to deliver ok content at least. tonyhermansen Your internal/external situation is very strange. I wouldn't expect user tenancy to affect content sharing (that happens through a combination of in-room hardware and software) to be affected by the Teams user account in any way. Any commonality to the external users? e.g. laptop make/model, or are they from one company who might be applying some funky system policies?
The 1080p EDID emulators I am using are ~£20 each from a large online retailer that has an association with a South American river.
