Full FeedNew MacBooks taking advantage of GPU accelerated video decoding?
It seems the MacBook refresh may have brought a new feature to OS X in the form of GPU accelerated h.264 video decoding. Currently, improvements to CPU load can be seen with new MacBooks, but the feature could find its way on to a Mac with appropriate hardware near you.
Some MacRumors forum members have been talking about how the new MacBooks handle HD video content. Forum user MGLXP found that his old MacBook Pro used 100% of its CPU time for processing the same video that took only 28% of the new MacBook’s CPU time. Both machines shared the same speed of CPU, but the new MacBook has an NVIDIA 9400M, while the old MacBook Pro uses an 8600M GT.
MacRumors thinks the real explanation here is that Apple has built GPU acceleration into the special version of OS X that is installed on the new MacBooks. The acceleration seems to be somewhat hit or miss, though, as some videos do not experience such improvements.
While this is all still unofficial, it seems Apple is working on features promised for Snow Leopard. You might recall that Apple promised QuickTime X for Snow Leopard, which will optimize audio and video playback.
While currently only new MacBook’s may be taking advantage of some GPU accelerated video decoding, it seems possible that this could be extended other machines with the necessary hardware. Now we just have to wait and see what Apple has to say about all of this.
Read [MacRumors]
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Should be able to extract the raw video stream and do some analysis on it though. Get an idea what the encoder is doing. For a visual comparison you don’t need to know anyway.
on March 24, 2009 at 04:26 AM - LINKejaculare precoce