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.
3gb stands for three gigabytes and that is an amount of memory. So I'll take your question to mean what can I do with 3gbs. Well that's about 600 songs or 150,000 jpeg images or 15 mins of video recorded at 1080p. All rough estimates.
5,460 for a 3 meg photo in JPEG format.
The higher your megapixel , the more memory a picture would take up.With 12mp you would probbably hold 5-10 picturesI would recommend using a memory card with at least 1GBof memory.
If you have Photoshop or Lightroom installed just open that image in CameraRaw Photoshop plugin or in Lightroom and save or export image as JPEG, otherwise see related link and download software which allows you to convert raw images to jpeg.
The "best" mode gives your .jpeg images the least compression, therefore the least detail loss. It also makes for larger files, but with high-capacity memory cards this isn't really a problem unless you're shooting a great deal without a spare card (not a good idea).
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=Joint Photographic Experts Group
JPEG XR was created on 2009-04-14.
.jpeg stands for 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)