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Very very high cpu usage while rendering

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Chris Wynn
Very very high cpu usage while rendering
on Mar 30, 2017 at 6:14:57 am

I'm using am i7 4790K & Sony vegas pushes the CPU all the way to the 90's at times. My CPU is well greased & as a good aftermarket fan. Prior to me even pressing the render button, my CPU is idling around 4%. Anything would help.


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László Kovács
Re: Very very high cpu usage while rendering
on Mar 30, 2017 at 4:54:04 pm

Tha CPU is there to be utilized, and rendering is a hard work.
Near 100% Cpu is totally normal. I'd even worry if it would be way below 100, as that would mean a bottleneck somewhere in your system, which does not allow your Cpu to work at its full potential.

Best regards

László Kovács


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John Rofrano
Re: Very very high cpu usage while rendering
on Apr 1, 2017 at 1:07:08 pm

Chris, your post is the exact opposite of what most people come here to complain about. Usually, people are screaming as to why Vegas Pro is only using 30% of their CPU and taking forever to render. You should consider yourself extremely lucky that Vegas Pro is taking advantage of 100% of your CPU. Most people would be overjoyed if they saw that.

Rendering is extremely CPU intensive as László said and if Vegas Pro will use 100% of your CPU you are in a elite group of people who own a computer that Vegas Pro will actually take full advantage of. I have a12-Core (2 x 6-Core CPU's) and Vegas Pro can't figure out how to keep them all busy. :(

~jr

http://www.johnrofrano.com
http://www.vasstsoftware.com



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Alex Ka
Re: Very very high cpu usage while rendering
on Apr 4, 2017 at 8:34:06 pm

CPU can be well below 100% during rendering if the system relies on the GPU for that task.
Check in Preferences -> Video
You can also make sure the max. number of processing threads is at least 2x the number of cores. Mine is set to 16, which works out okay.


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Justin Coolidge
Re: Very very high cpu usage while rendering
on Apr 21, 2017 at 10:16:10 pm

I am getting 100% cpu on a 3 ghz cpu with 8 GB ram with just video preview.

I think this is a Vegas Pro problem,


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László Kovács
Re: Very very high cpu usage while rendering
on Apr 24, 2017 at 7:51:09 am

When you preview, various things can influence cpu usage:
-preview quality
-desired preview fps (60p preview takes more than 25p)
-resolution (playing a SD timeline takes much less than playing a 4K timeline)
-Effects used in the project (a blur takes huge lot of power)
-source media used (decoding AVC takes more than decoding mpeg2)
-gpu enabled/disabled (if you have a gpu that vegas can use, the cpu usage can drop dramatically)

So saying 100% cpu load during preview be a vegas problem without any additional detail, is something I would not say :))

Best regards

László Kovács


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