Why isn't my processor at 100% while rendering a video?

M

MaxPS

New Member

image sharing

http://s10.postimg.org/6wdc2bl49/TM_Dual_Cores.jpg

1 = I started to render an AVI in VirtualDub and noticed that it was going very slow.
I looked into it and found that there was a process running for a program I was using to demux an AVI.
2 = I stopped that process that said it was using 50% CPU in Task Manager.
The AVI started rendering a lot faster.

I want to know why it didn't stay at 100% and render even faster?

Is there a limit on rendering speed in VirtualDub I should change? (It was set on normal processor priority both in VirtualDub and in Task Manager)

Is there a bottleneck on my PC? (Dual core 2.8ghz AMD Athlon 2400+, 4 Gig RAM, 9800 GT) ((I know, I know. I'm getting a new PC soon))

If it is a bottleneck on my PC I'm guessing it's the video card since the CPU says it's only at 61% max? I thought most the processing is done on CPU with encoding. My video card apparently doesn't support CUDA processing. (According to another program anyway. At least not activated but I would think it would automatically have shown active if the option was available)
 
Without knowing your hardware, I would imagine that your HDD is the bottleneck, limiting the amount of information that can be processed.
 
It will probably be a bottleneck

Click the resource monitor button right there on task manager, and see if your HDD is pegged at 100%. Unlikely, but it may be that you can't write the file quick enough, so the CPU is having to wait.

You can also check your graphics card by downloading MSI afterburner, it will show GPU and VRAM usage, which will then let you see if your graphics card is the hold up.
 
A 9800GT will use CUDA, however you need to enable an external codec to do so such as Selur's cuda.exe encoder.
 
You must log in or register to reply here.
Back
Top