Extremely Slow CPU Rendering Speed (HVEC Encoding)

ItzSlayerTV wrote on 11/17/2019, 10:53 PM

For some reason whenever I try to render videos using CPU encoding I always get extremely long render times. I just tried to render a 12 minute 1440p60 video at 60Mbps using HVEC and came back with a whopping 3 hour estimated render time; with NVENC it only takes about 15 minutes to render. I have a Threadripper 2920X (12 Cores/24 Threads) so there's no reason that the render times should be so slow. Nothing else is open on the PC (besides background processes) and is no bottleneck that I'm aware of. I have all 24 threads allocated to rendering running at 80-100% utilization (differs per thread) and have GPU enhanced rendering on which should speed it up. Not sure exactly what the issue is, any help would be appreciated.

My Rig:

RTX 2070 (1950Mhz)

Threadripper 2920X (4Ghz)

32GB's DDR4 3200Mhz

Samsung 970 Evo SSD

Using Vegas Pro 16 (Latest Build)

Comments

Musicvid wrote on 11/17/2019, 11:10 PM

Yep.

But it's getting better. CPU h265 used to take a couple of months, and it wasn't that long ago.

Former user wrote on 11/17/2019, 11:45 PM

If you are using default setting for main concept HEVC CPU render (balanced) then something is wrong. On my slow 4core cpu I get 15fps on 1440p projects, BUT if you're encoding using 'best quality' preset then it's insanely slow, too slow for me to have ever even benchmarked it on my pc.

BruceUSA wrote on 11/18/2019, 6:55 AM

H265 CPU encoding only. 1080 60P. I am getting 57 frames. Encode with AMD VCE am getting 100+ frames here.