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Question: VTDecoderXPCService sucking up 25-30% of CPU

Anyone else seeing this in your Activity Monitor?


VTDecoderXPCService is running a full 25-30% of my CPU's on quadcore i7 iMac with 8GB RAM.


I have no apps running, yet the service is running like crazy..... any solutions?

Posted on Jul 20, 2011 9:30 PM

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Jul 25, 2011 2:30 PM in response to Doug Stringham In response to Doug Stringham

OK... I finally discovered the source of the problem.


VTDecoderXPCService is the sandboxing for video content in Lion. All things that are QuickTime related, audio or video, are sandboxed by this service. It just clicked as to what it is. We have iCam for our iPhones. It allows us to remotely view from the webcams on our machines. So... because iCamSource is a QuickTime-related service, VTDecoderXPCService takes over. So when iCam is operating, it's sucking up 25% of the CPU. Which I'm going to report to the developer. :-)

Jul 25, 2011 2:30 PM

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May 31, 2014 12:34 PM in response to Doug Stringham In response to Doug Stringham

VTDecoderXPCService, WindowServer, and kernel_task together total are about 70% of a CPU. Furthermore Safari is very sluggish when this happens.


Only Finder, Activity Monitor, FaceTime and Safari are open.


Quit FaceTime, and the problem goes away. Relaunch FaceTime and the problem resumes.

May 31, 2014 12:34 PM

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Jul 22, 2011 4:49 AM in response to Doug Stringham In response to Doug Stringham

I have a different but application-related problem: when I select my Documents folder, I get an "Application Quit Unexpectedly" report that shows the following -


Process: VTDecoderXPCService [551]

Path: /System/Library/PrivateFrameworks/VideoToolbox.framework/Versions/A/XPCServices /VTDecoderXPCService.xpc/Contents/MacOS/VTDecoderXPCService

Identifier: VTDecoderXPCService

Version: ??? (???)

Code Type: X86-64 (Native)

Parent Process: ??? [1]


The Documents folder closes and I can not read it.

Jul 22, 2011 4:49 AM

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Jul 25, 2011 2:30 PM in response to Doug Stringham In response to Doug Stringham

OK... I finally discovered the source of the problem.


VTDecoderXPCService is the sandboxing for video content in Lion. All things that are QuickTime related, audio or video, are sandboxed by this service. It just clicked as to what it is. We have iCam for our iPhones. It allows us to remotely view from the webcams on our machines. So... because iCamSource is a QuickTime-related service, VTDecoderXPCService takes over. So when iCam is operating, it's sucking up 25% of the CPU. Which I'm going to report to the developer. :-)

Jul 25, 2011 2:30 PM

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Jan 29, 2012 11:07 AM in response to Doug Stringham In response to Doug Stringham

Yes but on my imac (10.7.2), my vtdecoderservice randomly and repeatedly launches the soundtrack of a video of a CNC machine I recorded even though I'm fairly certain I deleleted that! A virus? I've run Sophos, Cleanmymac and Disk Utility (and Mackeeper until I was advised to remove that) and I've restarted with PRAM held down - none of which change this problem. The sound appears weven when there are no other progs running. I'm at a loss how to stop this. Apple: any ideas? Users: any one else had this weird thing?

Jan 29, 2012 11:07 AM

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Oct 30, 2013 9:15 AM in response to Doug Stringham In response to Doug Stringham

Skype can do the same (i.e. trigger VTD and keep it running at 25% CPU) if it leaves the FaceTime camera active. After a Skype session last night, I noticed my camera LED was still on, and VTD was chewing CPU cycles. Killed Skype - all gone.

Oct 30, 2013 9:15 AM

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May 31, 2014 12:34 PM in response to Doug Stringham In response to Doug Stringham

VTDecoderXPCService, WindowServer, and kernel_task together total are about 70% of a CPU. Furthermore Safari is very sluggish when this happens.


Only Finder, Activity Monitor, FaceTime and Safari are open.


Quit FaceTime, and the problem goes away. Relaunch FaceTime and the problem resumes.

May 31, 2014 12:34 PM

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Jul 24, 2015 5:57 AM in response to Doug Stringham In response to Doug Stringham

I experienced intermittent choppiness in QuickTime playback because of VTDecoderXPCService sucking up to 120% (multi-thread) CPU time.

As far as I understand, the service is not required for video playback in QuickTime, as oftentimes the videos would play fine while VTDecoderXPCService was not running.


I was able to fix the issue by moving VTDecoderXPCService.xpc package out of its system folder and restarting:


sudo mv /System/Library/Frameworks/VideoToolbox.framework/Versions/A/XPCServices/VTDecoderXPCService.xpc ~/
sudo shutdown -r now


--Niko

Jul 24, 2015 5:57 AM

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Question: VTDecoderXPCService sucking up 25-30% of CPU