OS X Video stutters in certain scenes
#1
Hi there.

A while ago when I watched Inception, I noticed that in the scene where they reverse the car off the bridge, the frame rate dropped significantly which made everything stutter. I thought that it must have something to do with all the raindrops in that scene, and never cared much more about it.

Last night, I sat down to watch Prometheus. In the scene in the beginning where you see Shaw's dream, the frame rate drops from 24 to about 10, and it gets bad enough for the audio to start stuttering as well. In likeness to the scene in Inception, this scene has many small "objects" in the image that are probably messing it up. The same happens later when we see the "recordings" of the engineers, which are made up of these white "pixels".

Now, I tried running the video in VLC, and it didn't have any problems with it at all, and the 720p version runs stutter free as well, so for some reason XBMC is struggling with the 1080p.

Is there anything I can do to solve this?

System:
Mac Mini 2010
2.4 GHz Core 2 Duo
8 GB RAM
OS X 10.6.8
XBMC v. 11.0 Eden
Videos are coming off of a 2 TB 7200rpm external drive via USB2.

Log from debug run is here: http://pastebin.com/Sgpc955T
Media info on video file: http://pastebin.com/nLB8LNhp

I hope I got all the relevant information now, if not, tell me what to do and I'll do my best!
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#2
Try extracting the movie from the rar file.
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#3
15:53:20 T:2954420224 DEBUG: FactoryCodec - Video: vda- - Opening
15:53:20 T:2954420224 NOTICE: Open - VDADecoder Codec failed to open, currently in use by another process

reboot
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#4
(2012-10-13, 19:11)Ned Scott Wrote: Try extracting the movie from the rar file.

No discernible difference.
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#5
(2012-10-13, 19:15)davilla Wrote: 15:53:20 T:2954420224 DEBUG: FactoryCodec - Video: vda- - Opening
15:53:20 T:2954420224 NOTICE: Open - VDADecoder Codec failed to open, currently in use by another process

reboot

Helped a lot, but frame rate still drops to about 11 sometimes. Image stutters noticeably, but audio keeps running.
Also, no programs are running, fresh reboot.

New debug log: http://pastebin.com/9RGYi4ah
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#6
you might also try playing videos when scrapers and other CPU sucker are not running Smile
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Video stutters in certain scenes0