Change format on picture from .png to .jpg

Asked by Ellen

My question is two part. I am trying to take screenshots of unusual pictures for a project that I'm working on. How do I change the format from .png to .jpg, and how do I crop the picture so I can save only the parts that I want.

I am new to Ubuntu. I know how to do this in Windows but not on Ubuntu....thanks

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Steven Danna
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marcobra (Marco Braida) (marcobra) said :
#1

Please save the screenshots and then open the saved images using Gimp to crop them and to save as jpg
You can also directly start Gimp from menu Apllications → Graphic → GIMP .....

Hope this helps

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marcobra (Marco Braida) (marcobra) said :
#2
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Sam_ (and-sam) said :
#3
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Kamiar (kamiar-deactivatedaccount) said :
#4

you can use nautilus-image-converter for convert scrshots too.

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Ellen (ellemu) said :
#5

How do I download Nautilus image converter?
I'm not getting the results I want from gimp.

--- On Mon, 5/25/09, Kamiar Nadimi <email address hidden> wrote:

From: Kamiar Nadimi <email address hidden>
Subject: Re: [Question #72256]: Change format on picture from .png to .jpg
To: <email address hidden>
Date: Monday, May 25, 2009, 5:42 PM

Your question #72256 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/72256

Kamiar Nadimi proposed the following answer:
you can use nautilus-image-converter for convert scrshots too.

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Steve (stupendoussteve-deactivatedaccount) said :
#6

Open the terminal and type:
"sudo aptitude install nautilus-image-converter"

(without quotation marks)

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ktech (ktech) said :
#7

I would actually recomend Windows users to start with kubuntu. It uses the Kde desktop. anyway you can install it on top of your ubuntu syste with sudo apt-get install kubuntu-desktop. Then install krita. Krita is an image editor siilar to ms paint but more advanced. TO easily install software in kubuntu search for adept in start menu. open adept and search sotware you need.

P.s you may find my site linux.host22.com useful

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Ellen (ellemu) said :
#8

I tried to install nautilus-image-converter, but my password won't type. I have used it to install other options. Is there something I'm not getting? I am the administrator and my password should work, but it just won't type...the crusor just sits there blinking.

--- On Mon, 5/25/09, Steven Susbauer <email address hidden> wrote:

From: Steven Susbauer <email address hidden>
Subject: Re: [Question #72256]: Change format on picture from .png to .jpg
To: <email address hidden>
Date: Monday, May 25, 2009, 6:54 PM

Your question #72256 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/72256

    Status: Open => Answered

Steven Susbauer proposed the following answer:
Open the terminal and type:
"sudo aptitude install nautilus-image-converter"

(without quotation marks)

--
If this answers your question, please go to the following page to let us
know that it is solved:
https://answers.launchpad.net/ubuntu/+question/72256/+confirm?answer_id=5

If you still need help, you can reply to this email or go to the
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Best Steven Danna (ssd7) said :
#9

There is also a command line tool that you can use to quickly convert a picture from one format to another. To do so, you can do the following:

1) Open a terminal (Applications->Accessories->Terminal)
2) Use the cd command to move the directory your pictures are in. If they are on the desktop you can likely just type: cd ./Desktop
3) Use the following command:

convert old_file.png new_file_name.jpg

where old_file.png is the name of your current png file and new_file_name.jpg is the name you are giving the new jpg.

To crop using gimp. Do the following:

1) Open GIMP (Applications->Graphics->Gimp Image Editor)
2) Open the desired file (File->open)
3) Select the Rectangle Tool (Either click on the rectange tool in the toolbox or simply press R)
4) Make a box around what you want cropped
5) Crop the Image with the Image->Crop to Selection Menu Item
6) Go to File->Save As
7) Save the file with a new name. If you give this file a .jpg extension it will be automatically converted.

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Ellen (ellemu) said :
#10

Thanks to all who offered help. I might even be able to do this!

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Sam_ (and-sam) said :
#11

Ellen,
when you type your password into terminal window, you wont see anything (stars or alike), you'll type blind, but it will still be recognized. It's your login password or the same which you use for e.g. Synaptic.
https://help.ubuntu.com/community/UsingTheTerminal

However, you may open Synaptic ##system administration -> Synaptic (package manager)
and install nautilus-image-converter from there.
But actually I'm not sure if this is what you're looking for; screenshots:
http://www.bitron.ch/software/nautilus-image-converter.php

##it's a script which will be added to ~/.gnome2/nautilus-scripts/
(btw. this symbol ~ stands for /home/user, the dot . stands for hidden file)

You may also search Synaptic for gthumb, it's easy to handle and converts also.
##it was default, but not anymore.
After installation you'll find it in applications -> graphics
http://gthumb.sourceforge.net/
https://help.ubuntu.com/community/GraphicsApplications

To take a screenshot of full screen: print(sysrq) key
To take a screenshot of active window: alt+print
Other option is in application -> accessories -> take screenshot ##gnome-screenshot

Another idea of taking a specific screenshot is using the plugin 'screenshot' of Compiz.
Depending how your graphic card supports acceleration you'll be able to activate visual effects 'Extra'
in
system preferences -> appearance -> tab visual effects
To get access to configurate a variety of plugins you need to install
compizconfig-settings-manager ##CCSM
https://help.ubuntu.com/community/CompositeManager/CompizFusion
https://help.ubuntu.com/community/CompizConfig

The 'screenshot' plugin allows with 'super' key' ##'windows' key
and left mouse click to take a screenshot from a specific area wherever you draw.
Hence, no need to crop anything.
It will place a .png file on the desktop right away when finished, (just needs to be converted again).