Handbrake uses almost 100% CPU?

[kastenbrust]

handbrake uses up the cpu power that isnt being used by other applications, including the o/s obdviously, so if your surfing the web and listening to itunes at the same time your going to slow it down considerably, my octicore mac pro ripped Borat last night in about 8 minuets, but a week ago when i tried to do the same DVD while listening to Itunes and browsing the store it took about 40.

 

[Vikinguy]

It's takes my MB alu about 45 mins or so to rip a dvd using handbrake with nothing else going on.

 

[fleshman03]

Meh. I have a 2.5 GHz, 6MB cache C2D from the previous gen MBP. Whenever I use visual hub or handbreak it goes up to 85% - 90%. I don't really have a use for H.264 so that might be the difference.

I barely notice a difference when I'm web surfing and encoding too.

Two hour movie is usually 45 minutes for rip + encode. For just encodes a 45 minute show is ~20 minutes.

I think it has a lot more to do with cache than GHz.

 

[ChimericGamer]

Handbrake I believe will use a maximum of 4 cores. If you want to use 8 you can right click on Handbrake in applications and go to duplicate, and run two instances of Handbrake and have each instance use a CPU to encode 2 DVD's.

The duplicate tool is extremely useful and works for alot of applications to run multiple instances of an application.

If you open a Terminal.app window you can use "$ open -n <PATH TO APP>" command to open new instances of the application, without sacrificing more hard drive space to duplicate files.

 

[macgeek18]

Here's a screenshot of what it's using now for me,but that's also with Safari,iTunes,and MS word open.Still running nice and quick.

 

[Reelknead1]

My Mac Pro dual quad core 2.26 with 16gbs of ram runs at almost all processors pegged when I encode anything. Its crazy, handbrake will use anything it can gets its hands on.

 

[BigBrocktoon]

I would like to hear for someone on a quad core machine. Does it do the same thing?

My i7 iMac shows eight full cores cranking in the activity monitor. It takes about 10% of real time to encode with Handbrake... as such, I have never even tried to use my 13" MBP.

 

[WPB2]

My i7 iMac shows eight full cores cranking in the activity monitor. It takes about 10% of real time to encode with Handbrake... as such, I have never even tried to use my 13" MBP.

Why does it show 8 cores? I thought the i7 imac's were 4 core machines. Is it because of the Hyperthreading that it shows 8 cores?

 

[yensteel]

Yep! it's because of hyper-threading.

 

[l.a.rossmann]

That's good.

Or do you want it to work slower?