Forum Discussion
Yealink HDMI ingest - lag and call failure
Nice to hear we're not alone! (although sorry you're also suffering with this issue).
It is completely subjective, but I'd have to agree that it seems like a recent update has introduced the problem. We've had our MVC800ii MTRs for around 18 months and didn't have any reports of this issue until towards the end of 2021.
I'm pinning a lot of hope on the new Teams Cast feature (we're currently testing it) as an alternative to using Yealink HDMI/USB-C ingest or the WPP dongles.
"Regarding the problem of delay in cable content sharing, this problem has been confirmed. When the customer is sharing content, the resolution of the TV is set to 4K, and the 4K resolution causes the CPU usage of the MTR application to be too high. The delay of the auxiliary stream is high or the sound and picture are out of sync. This issue is known internally by Microsoft and may be encountered by all manufacturers.
The solution to the delay problem is to adjust the resolution of the TV to 1080P. If some 4K TVs cannot be set to 1080P, you can purchase a third-party EDID Emulator accessory and connect it between the monitor and the HDMI port of the MCore to solve the problem."
- Thanks for the update. We have Extron CTL-100 workplace controllers in our rooms, I'm going to check that they are configured for 1080p EDID and will advise.
Having the same problem with a customer on fifteen MVC840 Systems. But the tricky thing is that it works when internal users use HDMI ingest. No problems at all. But when an external user that is not in there tenant uses this i will start to lag directly. Works for both when they share content wirelessly, But as soon as the external uses the HDMI/USB-C cable it goes bananas and video/audio lags big time. Will also try third party EDID management, but the internal/external difference is not making any sense to me.
- All of our rooms have 4K screens. This weekend I went around all MTR systems and set the display resolution directly on the MTR systems to 1920x1080. Most were running at 4K res so I need to check our CTL-100 programming as they should be configured to signal a 1080p EDID. We do have some rooms without CTL-100's and for some of these I installed pass-though 1080p EDID emulators. We now have 3 configurations that we will monitor:
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.