Thanks for the info and clips - plays fine on the timeline but does not render properly - renders in seconds, but is absolute nothingness. Tried a 4k template and a 1080 template. What would you render to?
"Not sure I follow - how will that test my system's ability to handle 4K? I only have 1080 files..."
You render a UHD XAVC-S 100Mbps file from your 1080 your files and then import those new UHD files (aka 4K) into Vegas for testing performance or UHD on the timeline. Vegas will automatically interpolate your 1080 source to UHD automatically.
Hmmm, my PC seems to chomp through the 4k footage no problem at all. Timeline playback is on best and seems to play without any issue or stuttering. Rendering to either XAVC at original 3840x2160 and also 1080 mp4 seems to be pretty swift too. couple of transitions, a bit of colour correction......
I'm either missing something or this 4k aint such a beast as I thought.
I'm simply asking as I'm tempted by one of Sony's new offerings, the A7rii which records 4K, but only at 30p, which I'm spoiled with 50p at the moment (1080)