MeGUI: half the speed in Windows 8?

[TECK]

Hi all,

For some reason, MeGUI does not use anymore 100% CPU in Windows 8. I used to get double the speed while using my i7-990x processor with MeGUI on Windows 7. When I used to encode previously a movie with automated 2 pass, the first pass was done in about 15-20min and the second pass in 40-50min. Now it takes the double of time with half the number of frames encoded.

Is there a setting that I need to enable in Windows 8, in order to use again the CPU at 100%? Changing the priority to Normal does not do anything, in fact I used to have the priority set to Low on Windows 7 and my CPU used to scream while encoding at full blast. Thank you.

[LoRd_MuldeR]

Priorities don't do anything at all, except when several CPU-bound processes are competing for the CPU.

What encoder are you using in MeGUI? What are your encoder settings exactly? If you are using x264, are you sure you didn't mess with the "--threads" option?

Last but not least: Are you sure you aren't bottlenecked by slow input, such as slow decoder or slow (single-threaded) Avisynth script?

[TECK]

Ya, I use the x264 encoder, for example:
program --level 4.1 --pass 2 --bitrate 5195 --stats ".stats" --output "output" "input"

I always use the one click encoder. There is something strange... On my 3rd movie test, I noticed the CPU is finally used at 100%? I did not changed anything on settings, beside the bitrate number. Running on dev version 2215.

[Sm3n2]

Hi,
I have a similar issue.
I have a new windows 8 pc and I noticed that megui (with x264 encoder) use the all charge (100%) but not the all CPU frequency (+ or - 4 GHz) Look what I mean:

http://i.imgur.com/3TzEM.png

Of course I'm using the thread option but it changes nothing at all...
Is Megui bridle CPU ? or x264 encoder may be ?

[Atak_Snajpera]

http://ark.intel.com/products/65719/

Default clock - 3.4Ghz
MAX turbo - 3.9 Ghz (probably if only one core is used)

You won't get 3.9 Ghz with all your cores saturated at 100% (too much heat!)

[Sm3n2]

Yep you right. Thank you :)