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Joined: 11/6/2020(UTC) Posts: 21  Location: Saint-Petersburg Thanks: 6 times
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Hello!
On vMix 24 got capture problem. If I adding more then 2 inputs via Decklink Duo 2 framerate is falling form 50 to smthing like 15-25
Render time is about 6 ms, GPU Mem: 21%, CPU vMix 7%, Total 12%, so system load is not too high
input 1 - Notebook 1920x1080@50p
input 3 - Notebook 1920x1080@50p
input 2 - Camera - Sony PXW-Z150 1920x1080@50p or 1920x1080@50i
input 4 - Camera - Sony PXW-Z150 1920x1080@50p or 1920x1080@50i
operating system - Windows 10
motherboard - B460 AORUS PRO AC
processor - Intel(R) Core(TM) i7-10700 CPU
graphic card - NVIDIA GeForce RTX 2070 SUPER
RAM - 32 Gb
attempts to solve the problem:
in BIOS Above 4G Decoding is enabled
changed Desktop Video from 12 to 11.7
reinstall and update vMix
changed camera output from 1920x1080@50p to 1920x1080@50i
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Rank: Advanced Member
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In the manual of your board you can find this:
1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the M2P_SB connector. The PCIEX4 slot operates at up to x2 mode when a PCIe SSD is installed in the M2P_SB connector.
And your problem looks like the card has only enough bandwidth for 2 camera's.
So I would investigate this, is there a SSD installed in M2P_SB?
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 1 user thanked Mathijs for this useful post.
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Rank: Member
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Joined: 11/6/2020(UTC) Posts: 21 Location: Saint-Petersburg Thanks: 6 times
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solution was to change Window Capture Method to GDI. With this setting Fullscreens works fine
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Rank: Member
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Joined: 11/6/2020(UTC) Posts: 21 Location: Saint-Petersburg Thanks: 6 times
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Originally Posted by: Mathijs  In the manual of your board you can find this:
1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the M2P_SB connector. The PCIEX4 slot operates at up to x2 mode when a PCIe SSD is installed in the M2P_SB connector.
And your problem looks like the card has only enough bandwidth for 2 camera's.
So I would investigate this, is there a SSD installed in M2P_SB? no SSD installed, 4 lines is enough for 4 inputs. Problem was in Window Capture Method
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Rank: Newbie
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Joined: 7/25/2013(UTC)
Posts: 5
Location: Czech republic
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Originally Posted by: svetotehnik solution was to change Window Capture Method to GDI. With this setting Fullscreens works fine Can you help me please where to change it? Thanks
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Rank: Member
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Joined: 11/6/2020(UTC) Posts: 21 Location: Saint-Petersburg Thanks: 6 times
Was thanked: 1 time(s) in 1 post(s)
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Originally Posted by: porez Originally Posted by: svetotehnik solution was to change Window Capture Method to GDI. With this setting Fullscreens works fine Can you help me please where to change it? Thanks 
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