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convert image from 4:3 -> 16:9

Posted: 2008-12-14T17:01:44-07:00
by ItsMee
Hi,

i have some backgrounds (4:3) I'd like to resize so they fit my 16:9 screen.

I'm aware that a stretch might look silly on some pictures - but that's not relevant for those backgrounds, i checked with Gimp. (But want to automate for the pure number of backgrounds)

How do I resize with convert changing the aspect ratio?

-resize -size didn't work out in my tests.

ItsMee

Re: convert image from 4:3 -> 16:9

Posted: 2008-12-14T17:07:50-07:00
by fmw42
ItsMee wrote:Hi,

i have some backgrounds (4:3) I'd like to resize so they fit my 16:9 screen.

I'm aware that a stretch might look silly on some pictures - but that's not relevant for those backgrounds, i checked with Gimp. (But want to automate for the pure number of backgrounds)

How do I resize with convert changing the aspect ratio?

-resize -size didn't work out in my tests.

ItsMee

If you know the exact sizes in pixels you want (your screen resolution will tell you that, e.g. 1024x768, etc), then

convert image.jpg -resize WIDTHxHEIGHT! image_resized.jpg

Width=desired screen width in pixels
Height=desired screen height in pixels

Or you can use percent.

NOTE the exclamation mark ! is what forces the resize to the exact pixels and does not preserve aspect ratio. See

http://www.imagemagick.org/script/comma ... php#resize

Depending upon your system (Windows, Mac, Linux) you may need to escape the exclamation or put quotes around 'WIDTHxHEIGHT!'. On Mac and Linux, the escape is \ and on Windows the escape is ^, I think.

Re: convert image from 4:3 -> 16:9

Posted: 2008-12-14T17:09:43-07:00
by ItsMee
Man, I've been searching for more than an hour - 5 min in this forum & now the answer!

Great - i tried & it works out.

Thanks!

Re: convert image from 4:3 -> 16:9

Posted: 2008-12-14T17:12:09-07:00
by fmw42
ItsMee wrote:Man, I've been searching for more than an hour - 5 min in this forum & now the answer!

Great - i tried & it works out.

Thanks!
Best to get familiar with :

http://www.imagemagick.org/script/comma ... ptions.php

and

http://www.imagemagick.org/Usage/