Compress AVI files

pfisherny
pfisherny used Ask the Experts™
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I not sure where this question would fall on this forum.  What is the best way to compress an AVI movie files?  For example, I have a SAW folder which is the root folder.  Within this folder, I have 5 individual SAW folders, each containing a separate movie.   SAW folder-SAW folder (SAW I), SAW folder (SAW II), etc....  Each of the SAW movies are 701 mb in size.  I don't plan on burning these movies to DVD.   I will be watching these movies on the computer.   I want to shrink these movies to save hard drive space.   I use Windows XP computer.
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013
Commented:
AVI files are already HIGHLY compressed in most cases.  You cannot compress them further.  MAYBE if you find the right compression algorithm, but otherwise, you can't.  You may be able to convert them to other formats.  But them you'll likely lose significant quality.  You could convert everything to Real Media formats, but I wouldn't.

Uncompressed video can run at 7 GB per MINUTE.  compressing down to 700 MB for a 90-120 minute movie is pretty impressive, don't you think?  And you want MORE compression?
Here's a chart which provides approximate MB per minute of video (among other things) for various file formats.
http://www.videohelp.com/oldguides/comparison
Got it.  Thanks for the clarification.
Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

Commented:
Could you explain why my comment is not being selected as the answer?
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These videos are already highly compressed, however you can still reduce them further.  This will result in a loss of quality however.

You could reduce the resolution, which will make the file smaller in return for a smaller picture size.  Or your could perhaps use a more efficient compression codec such as H.264.

A good free encoder for Windows is http://www.erightsoft.com/SUPER.html
Lionel MMSmall Business IT Consultant

Commented:
With the cost of hard disk drives these days you can get 1TB drives for less than $100, even external. You may want to save them on a second internal rive or an external drive. If this is not possible you can convert them to real player format--you will loose some video quality but it is till very good, good enough to watch on  small computer screen but it becomes very grainy on a large screen TV.

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Commented:
LeeW,

I am sorry for the confusion.   Originally, I meant to select Accept and Award points but I choose the other option.   Being that you were the first to answer and I thought your answer was clear and to the point, I am going to give you the points.    

Sorry to the others who posted a comment.  

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