I've got a small question. Recently I started working with Sony Vegas 16 (after not edditing videos for years) and I noticed that when rendering videos, my GPU/CPU/RAM/HDD are all not fully used. When rendering a simple 2k video (2560x1440p) at 60fps where I only changed the Gamma values & color levels a tiny bit, resource usage is as follows:

  • 55% CPU usage on average
  • 30% GPU usage on average
  • 2.5GB RAM usage on average
  • 3% HDD usage

I have the following hardware:

  • GTX 1070 TI
  • Intel i5 8600k overclocked to 4.5ghz
  • 16GB DDR4 RAM @ 2400mhz
  • The source-video and target-video are both on a raid 0 HDD pair (total 1TB, can easily get speeds of 150-200MB)

I use the following rendering settings:

  • Format: MAGIX AVC/AAC MP4
  • Encoder: NVidia NVENC Encoder
  • Resolution: 2560x1440
  • Framerate: 60hz
  • Profile: Main
  • Field order: None
  • Pixel aspect ratio: 1
  • Variable bitrate with max and average both set to 80.000.000 bps
  • Preset: High performance
  • RC Mode: VBR

If someone could give more insight on why my resources are being used so poorly, then that would hugely be appreciated. What I did notice is that when not using the NVidia NVENC encoder, but MainConcept AVC, the CPU usage will actually go to 100%. Is it perhaps that when using NVENC, threads on the CPU are dispatching tasks to GPU cores, then the CPU is waiting for GPU to finish & the whole cycle repeats where CPU creates new tasks and dispatches them to GPU?

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