Only one core of a multi core cpu utilized

[btbop]

Hi, I have been a VS user for a long time now. I am currently using VSPro X5. I have an Intel Core i7-3770K overclocked to about 4.3GHz. I am running a little tuning utility program by intel to validate that when using VSPro X5 it is indeed utilizing only 1 core and about 19% of the CPU. This is irregardless of whether or not I am editing or encoding video. I have selected all of the hardware acceleration options and optimizations to no effect.

I also use MainConcept's encoder to render certain video and have validated that all 4 cores are engaged during the process and about 65% of the CPU is utilized.

I downloaded and installed the trial version of X6 and ran it and used it to process video with the same results as X5.

I am running 64 Bit Win7 Ult.

I am wondering if I am doing something wrong. Am I missing something?

For the sake of comparisons, an AVI file converted to MPG (720x480, 1500kbps) is converted by:
MainConcept at about 200fps
VSPro X5 at about 30fps

[Natal]

My computer has the same processor and is overclocked to about the same amount.

Using the Asus monitor, transcoding a clip to Bluray uses both threads of each core (ie 8 virtual cores) at ~90% efficiency each for H.264 and ~70% for mpeg2. Transcoding to "same as" (mp4/H.264) used all 8 at ~85% efficiency.

What is your CPU temperature? Is it overheating? Running all 8 virtual cores gets the CPU very hot in short order, and if you don't have adequate cooling it may be throttling.

[btbop]

Hi, thanks for your reply. The CPU temps are within reason and the the CPU is stable at stress tests of 100% core use. So, that's not the problem.

What I noticed, recently, was that, if I am transcoding video using VS X5 with only one track in the main video track, VS Pro will encode using all cores. However, if I add a video or img file into track 2, VS X5 will no longer use all 4 cores. I experimented with different file types to see if that would improve the encoding efficiency, but nothing really changed. For example:

Test #1
Main track: video_file.m2t

Encoded to video_file.mp4 (using iPhone HD settings) ---> fast conversion (4 cpu cores @ ~ 65%)

Test #2
Main track: video_file.m2t
Track 1: pic_file.bmp

Encoded to video_file.mp4 (using iPhone HD settings) ---> slow conversion (1 cpu cores @ ~ 25%)

Test #3
Main track: video_file.m2t
Track 1: video_file2.m2t

Encoded to video_file.mp4 (using iPhone HD settings) ---> slow conversion (1 cpu cores @ ~ 25%)

So, from what I'm seeing, VS5 will not allow for muticore processing when more than 1 track is being edited or converted.