So we purchased the "blackmagic quad hdmi recorder".

Purchased to capture laptops primarily. Already using a decklink duo SDI card for cameras. I want to be able to capture the desktop via HDMI directly avoiding adapters to SDI.

Card is installed and everything is recognized with latest drivers. It would seem the card is seeing a native resolution of 1920x1200 which isn't supported in VMIX. We tried to force 1920x1080 from the GPU settings on the laptop and no luck. It just refuses to recognize properly and I get a weird resolution on the screen of 1600x1024. (THIS IS WHILE DISPLAYS ARE MIRRORED) So the desktop is cut off on the sides and I've included pictures to illustrate.

If we extend the desktop and try everything again, we can get it to work properly. It then switches to Desktop at 1600x1024.jpg (2,848kb) downloaded 11 time(s). and everything is happy and nice.

Is this and EDID issue. I've searched the forum and found one instance of someone else having this problem however I didn't really see a solution posted to this. We've called Blackmagic and they seem to be a bit surprised as well.

Anyone seen this issue before and found a workaround. I really need to be able to capture the PC in mirrored mode and NOT extended. Otherwise the card is somewhat useless and I will have to find something else.

Just in case, current specs on PC are;

i9 9900
32gb ram
ROG Strix 2070 Super (8gb)
Blackmagic Decklink Duo capture card (SDI)
VMIX Pro

Thank you.

Hi in case you have intel gfx card on your laptop you have to go to intel control panel -- multiple displays --- and select the BMD device from the drop down menu and check if the display scaling scaling option is selected for some reason in the maintain aspect ratio is selected i also get black screen... when i switch to display scaling it works normaly

You need an EDID minder in between the laptops and BM HDMI capture cards, set to 1080p.
The BM edid unfortunately is locked to 1920x1200 and can't be changed.

As I wrote in my other post, I was able to get the Decklink Quad HDMI to work, simply by putting a Blackmagic HDMI to SDI Mini Converter between the PC and the Decklink Quad. The Apple Macbook Pro with Thunderbolt 3 also worked in 1920x1080@50Hz. So I would assume that the EDID of the BM Card is not locked to 1920X1200@59.59Hz, but is simply miscomunicating.

Thanks MrKneeland. I followed your advice today and it worked even though I live in the US. I actually found that things worked perfectly UNLESS I put the refresh rate at 60 HZ. Wow!!!

ISSUE FIXED!!!!! I have tried this fix on three different laptops (2 different Lenovo laptops and 1 Surface Pro) and all worked with a direct connection from their HDMI port to the BM Decklink Quad HDMI. This worked for duplicated and extended desktops.

Two central issues I found:
1) Check to see if your graphic device's "Refresh rate" is 60 HZ. I found that THIS DOES NOT WORK! Change it to 59 HZ or 30 HZ.
2) Check to make sure that the "Active signal resolution" of the graphic device is set to 1920x1080. However, I have seen this work at 1366x768 on one of the Lenovos.


Change "Refresh rate" by going to Display> Advance display settings> (Select Display 1 or Display 2: BMD HDMI from drop down).
Next, click "Display adapter properties for display 1 (or 2).
Next, Under the "Monitor" tab, change the refresh rate to 59 HZ or 30 HZ.


Change "Active signal resolution" by going to Display> Advance display settings> (Select Display 1 or Display 2: BMD HDMI from drop down).
Next, click "Display adapter properties for display 1 (or 2).
Next, Under the "Adapter" tab, click "List All Modes" and select 1920x1080 59 HZ.

This takes less than 30 seconds in real time. Just sounds long. However, no EDID equipment needed.

I hope this helps you, because I was ready to send the Decklink Quad HDMI card back to the store.