Animated JPEG are multiple single jpeg images that is runned under a javascript which runs the jpeg like a animated GIF, by frames of each images.
The definition of JPEG is "Joint Photographic Experts Group".
JPEG XR was created on 2009-04-14.
.jpeg stands for Joint Photographic Experts Group.
JPEG=Joint Photographic Experts Group
Jpeg files are ones that are pictures. So, anything that is not a picture you should not makea jpeg file.
Maybe you are trying to paste a jpeg file and nota jpeg picture. You must insert a jpeg file (is a command in the menu) while you can copy&paste a jpeg picture from other programs (for example: MS paint brush)
JPEG XR was created on 2009-04-14.
Jpeg - joint photographic experts group
The JPEG format was specifically designed to minimize the size of the file beyond what other formats were able to do at that time (for example BMP RLE or GIF LZW). In order to achieve it, it was decided to accept minor degradation of the image quality - with other words the compression is lossy. For more details about how the JPEG format compares to other image formats, please see the related question.
JPEG is a bitmap file type. There are many bitmap file types but JPEG is the one which uses the least amount of memory. However, JPEG image file sizes can be changed by how they are saved in the data loss compression feature which JPEG uses.
JPEG is the same as JPG. However if you really want to rename your .jpeg images into .jpg, you can go to Command Prompt, navigate to the folder of where your pictures are stored, and type in: ren *.jpeg *.jpg