CS6/Decklink Lag on Mac

[Daryl Burney]

This is a known issue that has been with decklink cards for at least the 8 years that we have been using them.

The processing on the cards seems to delay the video and audio by 4 frames. This is why Fcp has a 4 frame delay built into their setup, to delay the computer monitor video by the same 4 frames, so that it matches your broadcast monitor.

In Fcp the 4 frame delay setting is under system settings and then select the playback tab…viola.

This keeps your playhead and your computer video in line with the decklink video/audio output.

In cs6 there doesn’t seem to be a delay solution that I can find.

Solution…buy a aja kona card.They are a little more expensive but have no noticeable delay.

[Abhishek Seth]

Hi Matt.

I am using Avid MC 7.0.3 with BM Ultra Express (drivers 9.9.3) and getting the same 2 frame lag while playing video through HDMI out and audio via XLR. I usually edit feature films where we shoot everything on 24 FPS and need 3rd monitors to edit and preview as standards. I’ve edited on FCP and Adobe premier but all has the same problem. Why it can not be solved? It really is frustrating as Directors and production people are not the creative ones, and when they observe this problem, well sometimes they don’t, they doubt the editor’s skills and even after explaining the technicalities of the matter they reply with “Then why the F#%k are we spending so much money on something which can’t even play the edit in sync…”

I have tried everything but couldn’t find any solution for it. I hope u can understand my frustration as a technician. Pls help with some solution, If any is available.

Thanks.
Abhishek.

System details – Mac Pro Six-Core 3.5GHz , Intel Xeon E5 with 12MB L3 Cache And Turbo Boost up to 3.9 GHz, memory 32GB, Dual AMD- – FirePro D500 graphics processor with 3GB of GDDR5 VRAM each, 256GB PCIe-based flash storage. Storage – Netstor Raid 5 with Enterprise class HDD’S 24TB.