all image formats are converted to jpg when saving to photos??

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all image formats are converted to jpg when saving to photos??

Hi,

Does the iphone Photos library saves images only in jpeg format ??
i have downloaded a png file (either from mail attachment or from the web), clicked on the image
in order to save it and saved it to photos. then, i sent an email back with the picture but to my surprise received it as jpg ?
can't i download a png file to photos and save it in its own format ?
my app quite depends on it.... 😟

thanks.

imac, Mac OS X (10.5.7)

Posted on Jul 16, 2009 12:27 PM

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Answer 1

K T

Level 7

23,889 points

Jul 16, 2009 10:42 PM in response to nkobik

nkobik wrote:
downloaded a png file (either from mail attachment or from the web), clicked on the image
in order to save it and saved it to photos. then, i sent an email back with the picture but to my surprise received it as jpg ?

Humor me pls. Take that jpg that came over via email, change the extension from .jpg, back to .png, and see what happens when you try to open it then...

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Answer 2

Jul 18, 2009 3:27 PM in response to nkobik

Changing the suffix from jpeg to png will accomplish nothing with the possible exception of a crash.
Might as well try to set it to .doc or .pdf

Mail app does resize images before emailing them and they are sent in jpg format.

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Answer 3

Jul 16, 2009 9:22 PM in response to nkobik

I'm pretty sure everything in the photo lib is jpeg. If you write to the album you just provide the image and it takes care of the format. If you need png files you'll have to transfer them yourself and save in your own documents director.

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Answer 4

K T

Level 7

23,889 points

Jul 17, 2009 7:46 AM in response to Bang A. Lore

Bang A. Lore wrote:
I can't think of an image viewer out there that gives the file name precedence over the actual format of the data.

I'm not concerned with fnp - counting on just the opposite, actually, in that the file itself wasn't altered beyond the suffix on the name. A png is as a png does 🙂

As I asked, pls humor me and wait just a bit for the op to test before throwing a rope over the nearest header, thanks.

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Answer 5

nkobik Author

Level 1

5 points

Jul 18, 2009 7:34 AM in response to K T

Hi

i did not try the PNG renaming yet, but i've tested some jpg photos as well and when sending a photo
over mail iphone seems to change the size of the photo. i'm not 100% sure of this because my way of testing it is to send it from my iphone, than download from the mail to the desktop, keep this version,
than sending it back to the iphone, save it, send it again, and download the second version to the desktop. on each round trip i get different size for the jpg.
why is that ?

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Answer 6

K T

Level 7

23,889 points

Jul 18, 2009 7:54 PM in response to Scott Squires1

Changing the suffix from jpeg to png will accomplish nothing with the possible exception of a crash. Might as well try to set it to .doc or .pdf

Why so closed minded, Scott? The least you could do is try it along with any naysay.

If the file suffix was arbitrarily set to .jpg during the mail transfer, then putting it back to what it was originally would work - it only takes a moment to test, and if it doesn't work, you all get to laugh at me in public....like I said, humor me...you might need the same favor some day 🙂

And sorry to hear your mac crashes if you change the suffix like this...hope you have AppleCare ...

Ken

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Answer 7

nkobik Author

Level 1

5 points

Jul 19, 2009 12:19 AM in response to K T

Hi,

If the suufix is changed.. well this is the least of my problems now.
about the JPG resizing -
is this a fact ?
a JPG will always be resized by the email app ?
is there now way to pass a photo (or any image file) from one iphone to another
without the file being resized ???

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Answer 8

nkobik Author

Level 1

5 points

Jul 19, 2009 1:03 AM in response to Scott Squires1

not only that it changes the suffix, but it also resizes JPGs
each time it passes through the mail. isn't there a way to pass an image file between ihpones where i can be sure the image wasn't touched ?

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Answer 9

Jul 16, 2009 11:11 PM in response to K T

That will accomplish significantly less than simply looking at the file header. I can't think of an image viewer out there that gives the file name precedence over the actual format of the data.

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Answer 10

Jul 19, 2009 12:36 AM in response to K T

I think if you find the system changing the extension of a file on it's own you should file a bug report.

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