What are the best tricks for compressing large files into small archives? For example, how can I compress a 1GB file into a 200-400MB archive? I know things like this are possible, but how? I use Winzip and WinRAR.
here is the correct link, http://www.7-zip.org/
the one you provided is not an official one.
The maximum compression possible depends on the data you try to compress.
For example compressing a JPEG image won't change much because JPEG is a compressed format by itself.
Compressing a plain text file on the other can change quite a lot. If it contains a lot of spaces and line spacing within the actual text the file can easily be compressed to only 40-50% of it's original size.
Be sure you have a good processor otherwise can take more time.
when comlpressing with winrar: Compression
Method : compression methods are supported: "Store", "Fastest", "Fast", "
and "Best". The Best method provides highest compression and is used to
reduce the size as much as possible. Normal compression is usually the best
choice for daily backups.
you can convert data to a compressed format, like wav to mp3, HD movies can be shrunk in mkv format, it will be more than a Gb to 400-700 mb.
winrar and 7 zip are recommended.
I'm not aware of any "tricks", you're pretty much limited to the compression software's capabilities. The most ubiquitous (and effective) algorithm is Lempel-Ziv, which implements lossless compression.
Studies show, you'll probably get the best compression with 7 Zip (and it's corresponding format "7z") which is slow but effective. The next runner up was WinRar (rar format).
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