How come when I save a jpeq the file size reduces so much?
822956
If you took a picture of a blank wall, then one color value would be sufficient to characterize the picture, with no information loss.  As soon as you complicate the picture, things get interesting.\n\nMost compression algorithms do involve a loss of resolution, but they attempt to minimize it.
973531
if you want that file to grt less space on your HDD from lets say 4 MB to 2 MB you can lower its quality but if you want to make it shorter , and this makes me think of the time it plays you can use an audio editor http://audacity.sourceforge.net/  , this one is free and safe
566079
In theory, you could copy a feature length movie (most of which are on 8.5 gb dual layer disks) onto one without having to compress it. But the blanks are still very expensive, and the whole DVD shebang is on the verge of obsolencence anyway, so don't bother with it if you haven't already got one, unless you have a specific reason for having one.
435724
JPEG is not a lossless compression format, so every time you save an image as a JPEG, some information is lost by the JPEG approximation algorithm. \nTo prevent this, either save as an uncompressed format, such as bitmap, or use a lossless compression format, such as PNG. You may also use software to adjust the compression factor for your JPEG to decrease information loss.\nA good piece of free software supporting these functions is IrFanView, which can be downloaded at the link below.
510978
As a serious tip, if you need more disk space, delete things, or buy a new hard drive.  The 'compress old files' is a terribly implemented feature in Windows XP.  I recommend not using it.
247776
Open it in "Paint" and you can use the "stretch / Skew" tools to make it a smaller file.
85173
at the command prompt. type "FORMAT D: /q |y" \n(without the double quote and assuming your 8gb is on drive d)
533857
more memory and bigger pagefile size
412566
Your 1 Gig file is probably already compressed.. If it's a Video file, that is probably true. If it's the swap file, it's uncompressable because it could not efficiently store high-priority data without a large time overhead. You can buy a DVD ROM for next to nithing these days... perhaps to transfer the file to a DVD?
67040
Go to C:&#92;Documents and Settings&#92;Favorites and put it on a disk or e-mail it to yourself. its less than 1MB usually.
172438
You can't incease it's quality, if that's what you mean. Once a file is encoded it stays at the same quality even if you do it at a righer bit rate. It will go smaller if re-encoded at a smaller bit rate.\n\nIf you want to just make your file bigger, you might be able to do so if you buy Apple's Quicktime 6 Pro, and edit the movie so that it plays the movie more than once in the same file (i.e., when you're in the movie editor, copy and paste a scene or all the scenes over and over again).
210407
Depends on the file type, how it was saved, etc. I would advise you find the file type and search the web for an answer or give more details when you post here.
789880
This is normal, if you've got the option in question switched on. You can tell Windows to colour the name of compressed file blue to tell you they're compressed. There's more detailed info about this here:\n\nhttp://answers.google.com/answers/threadview?id=534608
546742
There is no way to answer this question as most modern compression algorithms use tokenization. The extent of tokenization possible is dependent on the data being tokenized. It is POSSIBLE that a handpicked special instance of a 1GB file could be reduced to 50MB or so.\nIt is also important to know what format the movie already is in (wma,mpg,avi,rm) as if it is already compressed further techniques will have minimal effect.
1065248
file might be to big... try to resize it in paint... stretch and skew to 75 by 75 or smaller.. \n\nor it could be the way the picture was saved as...i .e.. jpeg , img.... so forth.. try to save picture again under differ saving.
1040948
Its the same with converting mp3 files to .wav files. The size gets bigger. You cant change the size or preserve it. Its just how the extension handles the file. AVI files are pretty out of date now. They have been one of the first extension that were created for movie and video files. They never changed in size. Then as the years passed, more extensions were created and it would compress the file size more and more. The compression of files will always get better and it will improve, but the original extensions that we have out there will not change because thats just how it was built in the first place. There might be a future invention where they might have a program that will compress avi files into a compressed avi file, but for right now, there is none.
920488
You won't lose anything when you copy your jpg files from your camera to your disk. Regarding the size difference, it has nothing to do with JPG. If you don't use compression for your disk drive, the size of any file is usually not greater than the size on disk because the disk space is allocated in unit chunks for storing a file. If the file size is not equal to even chunks, the file needs only part of the last chunk but still occupies that whole last chunk. The size-on-disk differences are probably caused by the fact that the disk and the camera storage media use different unit chunk size.\n\nJPG usually introduces some loss to the original image (such as bmp). But that loss has already happened once an image is in the jpg format.