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Compression for size reduction

I have some quicktime videos that include some data files a couple of images etc. There may be five main folders within each archive. So each archive may be 5Gb. I don't know what output size I am looking for ( i am not sure what's possible) but half would be nice. I am using winrar but open to suggestions...thanks

dovidmichel

I don't think you will be able to reach that goal. For the most part I have not seen much difference in compression programs as far as amount of compression goes. Also those types of files typically just will not compress very much.

SysExpert

I agree. They are already compressed.

Maybe there is some specialized programs for this, but I have not heard of anything offhand.

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kode99

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chadaort

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Now this was my thoughts on compression up till this point. I got a rar file from a cousin with some tutorials on it. The size of the archive was 185,222 KB and after extracting it put out another rar file and the size was 801,164 KB. The I extracted that file to reveal three tutorials each in its own folder. The size of the folders are 293 MB, 114 MB, 374 MB. Now is there a way to tell how the compression was done? I went to properties and the archive tab but didn't seem to see anything helpful there.