Comments on: Slow photo saving and lack of EXIF with the iPhone API http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/ The next level in Productivity Thu, 22 Jul 2010 22:29:46 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Martin Kou http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-598 Martin Kou Sat, 20 Feb 2010 06:32:22 +0000 http://www.stepcase.com/?p=209#comment-598 The Camera app saves directly to .ithmb files in ~/Media/Photos, which is raw YUV encoded, and so it's fast - I highly suspect they have yet another performance reason for using YUV instead of RGB there. UIImageWriteToSavedPhotosAlbum(), on the other hand, compresses the full res image to JPEG and then saves to ~/Media/DCIM. The compression step alone in an iPhone 3G takes 6 seconds. This seems like a screw up on Apple's part - they probably had two different teams to handle the Camera app itself and the saving API so they ended up using different methods. A possible way out is to reverse engineer the .ithmb and the "Photo Database"'s file formats and write to them directly. But Apple may not allow such an app to pass review. The Camera app saves directly to .ithmb files in ~/Media/Photos, which is raw YUV encoded, and so it’s fast – I highly suspect they have yet another performance reason for using YUV instead of RGB there. UIImageWriteToSavedPhotosAlbum(), on the other hand, compresses the full res image to JPEG and then saves to ~/Media/DCIM. The compression step alone in an iPhone 3G takes 6 seconds.

This seems like a screw up on Apple’s part – they probably had two different teams to handle the Camera app itself and the saving API so they ended up using different methods.

A possible way out is to reverse engineer the .ithmb and the “Photo Database”’s file formats and write to them directly. But Apple may not allow such an app to pass review.

]]> By: acoward http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-584 acoward Fri, 08 Jan 2010 21:32:28 +0000 http://www.stepcase.com/?p=209#comment-584 Was this ever fixed? Was this ever fixed?

]]> By: Tobias http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-373 Tobias Mon, 18 May 2009 20:54:24 +0000 http://www.stepcase.com/?p=209#comment-373 But somehow it must be possible to get an image with geo data out of the camera. Because if you open an image taken with the Camera app on a Desktop, it has valid geo-data attached. At least that is what Pixelmator showed me. What do you think? But somehow it must be possible to get an image with geo data out of the camera.
Because if you open an image taken with the Camera app on a Desktop, it has valid geo-data attached. At least that is what Pixelmator showed me.

What do you think?

]]> By: Johnny Kwan http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-307 Johnny Kwan Fri, 24 Apr 2009 09:08:09 +0000 http://www.stepcase.com/?p=209#comment-307 23: It's 6807099. Just wondering, how do you "log a duplicate"? or even check for others' submitted bugs? 23:
It’s 6807099.
Just wondering, how do you “log a duplicate”? or even check for others’ submitted bugs?

]]> By: 23 http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-299 23 Thu, 23 Apr 2009 05:52:11 +0000 http://www.stepcase.com/?p=209#comment-299 Can you publish or send me the radr bug number for the bug you filed so we can log a duplicate? Can you publish or send me the radr bug number for the bug you filed so we can log a duplicate?

]]> By: simon852 http://www.stepcase.com/blog/2009/04/22/slow-photo-saving-and-lack-of-exif-with-the-iphone-api/comment-page-1/#comment-295 simon852 Wed, 22 Apr 2009 12:40:03 +0000 http://www.stepcase.com/?p=209#comment-295 OIC! Just wondering! Hope Apple would fix/release these secret tools soon! ^.^ OIC! Just wondering! Hope Apple would fix/release these secret tools soon! ^.^

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