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Source dropped / renderer dropped
Rank: Newbie
Groups: Registered
Joined: 4/4/2025(UTC) Posts: 1  Location: Devon
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Hi all, I am chasing some visually 'dropped' frames, both on SDI outputs (via Decklink), as well as over NDI outputs (viewable within Studio monitor on host machine as we as across the network). We are seeing the attached stats over approx 24hr period. I am confused as to the meaning of 'renderer dropped' and 'resync' but with such a low 'source dropped'. Machine is a high spec i9 with 64gb ram, huge SSD's, Win 11 (fully updated), vmix (fully up to date), NDI 6.11, Nvidia A4000 GPU (showing load of 24%). Render time is circa 6ms. running 1080p30. Nothing showing any stress in task manager. Seeing the same behaviour over multiple machines with same hardware set-up Any thoughts gratefully received  Screenshot 2025-04-03 at 18.35.21.png (249kb) downloaded 1 time(s).
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Rank: Advanced Member
Groups: Registered
Joined: 4/23/2017(UTC) Posts: 1,280  Location: Germany Thanks: 3 times
Was thanked: 173 time(s) in 155 post(s)
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#1 I assume vMix is using the GPU, not the CPU
#2 Have you tried resizable bar?
#3 PCI lanes exhausted. I see the 14th gen I9 has mainly 20 lanes. The GPU uses 16 the capture card I guess 4 or 8 and the M2 another 4. So if all are trying to get full bandwidth they can't cause they have to share lanes.
#4 enable HW offloading
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