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In 12.04, can the image format for Screenshot be jpeg? I change the file name to save to to be ended with ".jpg", but Gnome image viewer seems not be able to open it saying

Error interpreting JPEG image file (Not a JPEG file: starts with 0x89 0x50)

One example image is here Is it a true jpeg image file?


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I get the feeling that .png is the only possibility, even in xfce4-screenshooter and scrot. – user25656 Oct 1 '12 at 13:59
How can I know if a image file is jpg or png? – Tim Oct 1 '12 at 14:15
up vote 4 down vote accepted

The file you are linking at is a PNG image, true. I understood it via the file command.

There doesn't seem to be an option at the default gnome-screenshot tool for saving as JPEG format, but there is at Shutter, which can be easily installed via the Ubuntu Software Center:

enter image description here

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