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iMovie on iPad 2 beats most Macs in benchmarks

Benchmark information from AppAdvice.com

If the results of benchmarks run by Tim Chaten at AppAdvice are any indication, anyone looking for a good, fast iMovie workstation for doing editing in the field should take a close look at the app running on an iPad 2.

Chaten wanted to see how iMovie for iOS running on the dual-core A5 iPad 2 would stack up to the Mac OS X edition of the app running on a variety of Macs, so he took a set of files to an Apple Store to run three tests on all of the stock Macs in the store with the exception of the Mac mini. The results were astonishing.

In the first test, copying a two-minute test video shot on a fourth-generation iPod touch to an iPad or Mac, the iPad 2 was the hands-down winner. It copied the files in just 25.5 seconds compared to 56.5 seconds on the fastest Mac -- a Mac Pro.

The second benchmark encoded an unedited movie to 720p. Once again, the iPad 2 bested the rest of the Apple family by speedily encoding the file in 1 minute and 56 seconds. The fastest Mac in the bunch (hardly a portable machine) was a Mac Pro at 2 minutes and 15 seconds, while the fastest laptop was the 17" MacBook Pro; it timed in at 2 minutes and 20 seconds.

The final benchmark was more realistic, adding a title overlay, background music and images to open and close the movie. This was the only situation where the iPad 2 didn't beat the others, but it still rendered the video in a respectable 2 minutes and 5 seconds, close to the 1 minute and 48 seconds achieved by the 17" MacBook Pro.

Now there are some realities to look at. First, iMovie for iOS doesn't have the wide variety of editing features of the Mac version. Second (as pointed out by Gizmodo), the raw video was captured on an iPod touch featuring a chipset similar to the iPad 2, so the video is essentially optimized for the iOS version of iMovie. Finally, the iPad 2 has a built-in H.264 encoder that's similar to the Elgato Turbo.264 HD USB dongle used to accelerate H.264 encoding on the Mac. Add one of those to a Mac and you'll likely see better results for the Macs.

But still, if you're looking for a very portable way to do some limited video editing in the field, the AppAdvice benchmarks show that iMovie on an iPad 2 is an excellent and fast alternative. We'll probably never see an Academy Award-winning movie filmed and edited on an iPad 2, but it's nice to know that it could be done.

[via Gizmodo]



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iPad iOS

Benchmark information from AppAdvice.com If the results of benchmarks run by Tim Chaten at AppAdvice are any indication, anyone...
 

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Pat

How did you do the benchmark test on an iPad 1? iMovie does not run on iPad 1!

March 21 2011 at 3:03 PM Report abuse rate up rate down Reply
Andrew Cunningham

Like Marko, I suspected that the iOS version of iMovie was simply outputting very low quality H.264. However, this proved not to be the case.

The default data rate for 720p export in iMovie on OS X is actually lower than that of iMovie on iOS (9.26 mbits/s versus 10.71 mbits/s). The frame rate is also lower on OS X vs iOS - 24 fps vs 30 fps.

Having a hardware codec apparently makes one heck of a difference. Makes me wonder why modern Macs don't ship with one, or at the very least offload encoding to their video cards. Nvidia makes this available via CUDA; there are third parties that make a CUDA accelerated encoder for OS X:

http://www.mainconcept.com/press/single-view/article/cuda-h264avc-encoder-sdk-v11-for-windows-mac-os-x-and-linux.html

If Apple could standardize on Nvidia, then perhaps they could integrate something like this into iMovie?

March 17 2011 at 4:09 PM Report abuse rate up rate down Reply
KosherSalt

'Would be curious to see if this had to do with the fact that h.264 encoding/decoding is a function of hardware (on iOS devices) rather than software (as on desktop/laptop macs)

It'd certainly make sense if that were the case.

Hmm!

March 15 2011 at 4:53 PM Report abuse rate up rate down Reply
Jesse S

And what are the encoding settings? These are absolutely worthless results unless the h.264 encoder and switches are _exactly the same_.

Mobile iMovie probably uses a lower quality (and thus less intensive) encode.

March 15 2011 at 3:37 PM Report abuse rate up rate down Reply
Marko

The only way to have a meaningful comparison is to also compare difference in quality. It may not be obvious to some readers that different compression algorithms and settings have a dramatic effect on speed and quality of compression. iMovie may hide these settings from the user, but nonetheless they are present internally. Apple engineers can trivially make iPad faster or slower then Mac by changing these settings. As it stands, this article is either clueless or intellectually dishonest, depending on what the writer understands about this topic. It is also well known that Elgato hardware encoder is fast and low quality. It is also well known that most modern Macs, when set to encode in software roughly for the same duration as Elgato will produce as good or better result. Adding a hardware H.264 encoder of that quality would not be a great deal.

March 15 2011 at 2:38 PM Report abuse rate up rate down Reply
Josh

Maybe I'm confused, but when was there a 23" iMac?

March 15 2011 at 2:27 PM Report abuse rate up rate down Reply
david

This is AV Foundation at work, I can't wait for the new FCP.

March 15 2011 at 2:10 PM Report abuse rate up rate down Reply
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