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Old 10-02-2005, 06:16 PM   #1 (permalink)
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Default Winzip

OK, I'm getting into video making. I'm talking like using Fraps to make movies of games. Since fraps makes an almost 200MB video for every 30secs, I use VirtualDub to compress the movies. But I've seen people send files zipped, so I'm wondering what winzip does and how to compress files using it.

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Old 10-02-2005, 08:18 PM   #2 (permalink)
It's all just 1s and 0s
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since you've already compress your video files using vdub, winzip won't compress the file much more. However, winzip would be useful to package multiple files together.

When winzip compresses files, it searches the file for common bit patterns. it then stores these bit patterns in a dictionary. Then it uses a index to place the bit patterns in order.

for example, the original file bit pattern looks like
0001 0001 1001 1001 0011

winzip's dictionary looks like
1:0001 2:1001 3:0011

winzip's index looks like
1 1 2 2 3

please note my example could be incorrect in calculating the bit patterns. itsshown to give the concept of how the index and dictionary work together.

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Old 10-02-2005, 08:36 PM   #3 (permalink)
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Ooh, cool and interesting. Thanks.
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Old 10-02-2005, 11:35 PM   #4 (permalink)
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Well I took a new file and compressed it using WinZip. It went from 218MB to 180MB which isn't really that useful. I used the trial version of WinZip.

Am I doing something wrong, or does this always happen with .AVI files?
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