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alik60381442
Participant
February 19, 2024
Answered

In some cases, the CPU takes over the rendering task, causing the duration to increase.

  • February 19, 2024
  • 1 reply
  • 623 views

Hello everyone,

In Premiere Pro, during the rendering process, the GPU usually handles the work, and it operates quite quickly and efficiently. However, sometimes when I apply blending to a video, for example, when I apply an overlay to a smoke video and put it on top of the main video, during the final rendering, only this part seems to be handled by the CPU instead of the GPU. The GPU doesn't kick in until after this overlay section, and then the rendering process continues with high performance. If all processes were handled by the GPU, the rendering would finish incredibly quickly, but due to the CPU taking over, the rendering time is significantly prolonged.

My processor isn't a weak one, yet it struggles a lot during this overlay rendering process. I'm really curious about the reason behind this, and I haven't been able to figure it out yet. 

My system components are as follows: Intel i7 14700 KF, GeForce RTX 4070 Ti, 32 GB RAM.

    This topic has been closed for replies.
    Correct answer R Neil Haugen

    First thing was I checked ... and that KF CPU doesn't have QuickSync listed as an "advanced technology" ... so it's not got hardware acceleration for long-GOp H.264/5 media. Though that is only part of the speed thing if you are working with long-GOP media. That 4070 does, so maybe that can make up for that.

     

    So the other issue is the effect used. IF the effect is GPU accelerated, it's on their 'GPU Accelerated Effects' list. And I'd check that in their Help files. As if an effect is not on that list, all processing then goes to the CPU.

     

    I am puzzled by your rig though ... a 20 core CPU, a 4070Ti, and only 32GB of RAM? That's quite a choking point on that CPU right there. I'd recommend 64GB as a starting point ...

    1 reply

    R Neil Haugen
    R Neil HaugenCorrect answer
    Legend
    February 19, 2024

    First thing was I checked ... and that KF CPU doesn't have QuickSync listed as an "advanced technology" ... so it's not got hardware acceleration for long-GOp H.264/5 media. Though that is only part of the speed thing if you are working with long-GOP media. That 4070 does, so maybe that can make up for that.

     

    So the other issue is the effect used. IF the effect is GPU accelerated, it's on their 'GPU Accelerated Effects' list. And I'd check that in their Help files. As if an effect is not on that list, all processing then goes to the CPU.

     

    I am puzzled by your rig though ... a 20 core CPU, a 4070Ti, and only 32GB of RAM? That's quite a choking point on that CPU right there. I'd recommend 64GB as a starting point ...

    Everyone's mileage always varies ...
    A
    alik60381442Author
    Participant
    February 19, 2024

    I realized the lack of the Quick Sync feature thanks to you. Choosing a KF type processor, assuming that there would be no need for a CPU with integrated graphics in a system with Nvidia, I was clearly mistaken. You are also right about the RAM; I was planning to upgrade it anyway. I will support my system with dual channel 48x2=96GB. You've provided the most satisfying answer I've received so far, thank you.

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