DaVinci 4k raw dng playback settings

[Jamie Allan]

If you’re using Blackmagic RAW DNG 4K then the tests I’ve seen have put the bandwidth around 290MB/s, which should be fine with your T3 as it should run around 550MB/s as long as its not over 90% full. However there is a lot of variance with DNG RAW regarding bit depth and the particular version you’re using (if not BMD’s)

I also imagine your mobile GPU is not powerful enough to work with 4K material. We recommend either the highest specification MacPro D700 workstations or Linux Resolve Quad GPU systems to work with this sort of material

My advice would be to work in a high quality HD proxy (such as ProRes 4444), and if required re-link to the original material before exporting if you need to deliver at 4K. Be sure to go through all your shots again though once you relink to check on the grades as you may need to tweak some bits and check on sizing

Jamie Allan
Post Production Consultant
DaVinci Specialist (Linux/Mac)
Jamie@Jigsaw24.com

[Gianni Saponara]

Thank you Jamie!
I’ve just updated my MacBookPro. I’ve purchased an expander PCIe (Sonnet Echo Express SE II) a BMD DeckLink SDI 4K and a Gigabyte GTX 970 4GB. The graphic card isn’t yet installed. The DeckLink doesn’t work properly, I don’t know why, but when I playback a 4k raw clip on DaVinci the fan of my Mac turn very fast…maybe the problem could be due to GE750M, or wrong settings…I really don’t know…I hope someone could help me…This is the speed test of mac drive