Jpeg, png, gif, bmp

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Debbie

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Jpeg, png, gif, bmp.... could someone please tell me what is the most appropriate format to use for a pic on a facebook group? I want it to be as small as possible. I don't know this stuff.
 
jpeg should suffice - facebook seems to scale photographs if they're too large anyway.
 
Generally:
jpg for photos
gif for things with only a few colours, or animations
png for when you need to keep the quality up
bmp - never
 
The thing that grinds me about facebook (and the reason why I use flickr) is that any time you upload a photo you grant them permission to do with it what they please until such time that you remove it
By posting User Content to any part of the Site, you automatically grant, and you represent and warrant that you have the right to grant, to the Company an irrevocable, perpetual, non-exclusive, transferable, fully paid, worldwide license (with the right to sublicense) to use, copy, publicly perform, publicly display, reformat, translate, excerpt (in whole or in part) and distribute such User Content for any purpose on or in connection with the Site or the promotion thereof, to prepare derivative works of, or incorporate into other works, such User Content, and to grant and authorize sublicenses of the foregoing.
Click to expand...
http://www.facebook.com/terms.php
 
Face book scales and reduces quality of all photos that get uploaded. It also doesn't support animated gifs IIRC.
 
rorz0r said:
Generally:
jpg for photos
gif for things with only a few colours, or animations
png for when you need to keep the quality up
bmp - never
Click to expand...

Just a bit more on that (and pls correct me if I'm wrong...)
JPG is lossy. Only ever use it as you final product. The level of lossyness can bet set
GIF is lossless. It was originally in use on the CompuServe BBS. With the birth of the www, it was used all over untill Unisys, who owns the LZH compression patent on which GIF is based, threatened to enforce it. The web went into an uproar.
PNG was created specifically to replace GIF and it is open-source. Can be both lossy or lossless iirc
BMP is uncompressed and thus filesizes will be huge.
 
thed33p said:
J
GIF is lossless. It was originally in use on the CompuServe BBS. With the birth of the www, it was used all over untill Unisys, who owns the LZH compression patent on which GIF is based, threatened to enforce it. The web went into an uproar.
Click to expand...
It may be lossless but has some severe restrictions. As it is an 8 bit format, it is limited to 256 colours. Thus a gif image loses no quality in its compression, but if you take a high quality image and convert to .gif, there is a marked quality drop.
 
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