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CUDA, 60i and Kona/Decklink Output
Hey All
We’re working on a 1 hour event show for NBC which will air at the end of March. It has mixed frame rates – 23.98, 29.97p and 29.97i (or 60i). They wanted a “live” look for the event footage (thus the 60i) and the in-between segments about the athletes were shot at 23.98. a pulldown will be added during conform on the 23.98 footage. Our sequences are set for ProRes HQ 29.97i. The deliverable is HDCAM SR 1080i59.94 (sorry for mixing the 29.97i and 59.94i terminology. BMD calls it 59.94i and AJA calls it 29.97i)
The issue we’re having is with the Mercury Playback Engine. When we have it set for CUDA, the output is 29.97p and it drops frames like crazy when watching the SDI output of a Decklink, Kona 3 or Kona LHi. When Mercury Playback Engine is switched to software, the output is interlaced correctly, and there’s no drop frames. But now everything needs to render. This happens on all our Mac Pros, even though they all have different capture cards and GPU cards
System Details:
Mac Pro 4,1 (2×2.26) 52GB RAM (4 of them)
2 have GTX480 cards, 1 has GTX580 card, 1 has no GPU card
2 have Kona 3 cards, 1 has BMD Decklink card, 1 has Kona LHi card (all current drivers, Adobe plug-ins and software)
56TB Ethernet SAN with mostly Small Tree and Maxx Digital components, 1GbE to all systemsThoughts? in order for the output to look correct and not drop frames, we have to turn off CUDA processing, which is the whole reason we adopted Premiere Pro for this edit. The editors often times will turn off the capture card output, so they can turn CUDA processing back on. But then when a producer wants to come in and watch a cut on the HD monitor, they have to turn CUDA off and render
Eric Hansen
Production Workflow Designer / Consultant / Colorist / DIT
https://www.erichansen.tv -
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