Question / Help QuickSync with 4 monitors

[ukgamer]

Hi guys,

I've been having an issue with OBS and QuickSync since I acquired a 4th monitor.

I'd been happily using QS in OBS with 3 monitors (using a fake 4th monitor on the integrated graphics) for a while but after enabling this 4th monitor OBS tells me that there is no QS support, even though Windows allows me to enable the (now 5th) fake monitor.

If I disable the monitor, QuickSync becomes available as an encoding option in OBS again.

Here's two logs, the first from a test stream with the monitor enabled and no QS, and the other with the monitor disabled and QS enabled.

https://gist.github.com/anonymous/c1c36ca11f490102da09

https://gist.github.com/anonymous/d2cd9a4159793ff6a764

Just wondering if this is a limit with my hardware/software, or if this is actually a bug?

 

[Jack0r]

Hey, thanks for posting,
I think the problem is that in your first log, no monitor was connected to the Intel GPU, only the 4 connected to the ATI/AMD GPU. For your generation of processor, the quicksync, to my knowledge, needs at least a "virtual" fake monitor connected. In the second log you have one monitor attached to the IGPU and quicksync works.
So if you can connect one of your monitors to the IGPU you should be able to use 4 and QuickSync.

 

[ukgamer]

Thanks for the quick reply.

I had the 4 real monitors connected to the AMD GPU plus the fake monitor on the Intel GPU when QuickSync wasn't working. Are you saying that in order to use all 4 monitors and QuickSync I have to move one of the real monitors to the Intel GPU and keep the fake one enabled?

 

[Jack0r]

Well, on the log there was no fake monitor connected on the failed try. So you should probably test again and check that the fake monitor stays active when all 4 others are connected to the ATI/AMD gpu, or yea, just connect one to the IGPU, that way you wont need the fake monitor anymore.

 

[ukgamer]

Sorry, I must have made a mistake. I've attached another log along with a screenshot of my monitor configuration.

https://gist.github.com/anonymous/db49e66ef5160e3a3c09

You can see here that the fake monitor is attached (number 5). I can see in the log that the 4 monitors on the AMD GPU show up as expected along with the fake monitor on the Intel:

"Video Adapter Output 1: pos={4337, -360}, size={1280, 720}, attached=true"

Yet I still recieve the error:

Am I just doing something totally wrong here? Thanks for your patience.

 

[Jack0r]

Had to ask Palana to get certain information. It seems to be a limitation of the sandy bridge quicksync. Maybe Intel could fix it, but they do not seem to bother. So you will have to remove one monitor.

The other option would be to set the Intel HD 3000 to be the primary GPU in your BIOS, but I am actually not totally sure how this would affect some games as they might want to run on the hd3000 then as well. Which is probably not what we want.

 

[ukgamer]

Ah, okay. Not a huge problem I guess.

Thanks for your help.