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Compression - How low can you go?

By kather0525 ·
Good day !

I've tried a few compression programs ( PKZIP, WINRAR to name a couple ), but I'm finding that the larger the file size, the less the compression is. Is there a compression program that can compact large file sizes ( around 8mb )
without simply splitting them up into 1.4 MB diskette sizes? ( example: can 8mb be compressed to 2MB or even 1MB? )

Let me know what your findings are and thanks once more for your help,

Kelly

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Compression - How low can you go?

by amanabala In reply to Compression - How low can ...

Hello,
Without trying to give a lecture on File Compression, I should say that the file-reduction ratio depends on a number of factors, including file type, file size and compression scheme.
For example, text files compress very well.
If the 8 MB file you are trying to compress is a binary file like MP3 or Real Video or even an EXE file, there is not much any compression software can do...

-Ravi
ananth_manabala@yahoo.com

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Compression - How low can you go?

by kather0525 In reply to Compression - How low can ...

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Compression - How low can you go?

by Ann777 In reply to Compression - How low can ...

WinRAR is the better of the two compression programs named above.

But the results of compression depends entirely on what data is being compressed. Picture files tend to compress better than music files; text files compress best of all.

Yes, an 8 MB picture files can be compressed to a 2 MB file.... but it depends on the format of that data.

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Compression - How low can you go?

by kather0525 In reply to Compression - How low can ...

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Compression - How low can you go?

by opatzg In reply to Compression - How low can ...

A couple great answers so far, Compression can be fun. You can push most compression algorithms a little further as well pkzip has the -ex option.
Pictures can be compressed by making jpegs which sometimes look ok sometimes not. Also resizing onceyou make a jpeg tends to make the picture really grainy. Best recommendation, buy a cd burner so your limitation is >600meg and is standard reading for all pc's, and the media is fairly cheap and longer lasting than diskette. Again your compression will be dependent on your type of file, text files normally compress 90-98%, grouped files in 1 compressed file save even more since the bucket that file sits in can be up to 32k on large drives and the space is used whether the file fills it or just 1 byte of it.

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Compression - How low can you go?

by kather0525 In reply to Compression - How low can ...

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Compression - How low can you go?

by TheChas In reply to Compression - How low can ...

Compression ratio depends more on file type than size.

Files that are already compressed formats can actually grow when you use compression software, as the compression software adds error recovery data.

For images, jpeg and gif formats can behighly compressed as is, so there may be no further gain with a compression program.

For audio files, the same is true for the MP3 and WMA formats.

Remember, for all of the above formats, the original compression may be set for high quality / low compression.
If so, an archive program can compress the file further.

Since I moved from floppies to CD-R and RW, I only use compression programs to expand archive files that I download.
I just don't need to waste the time to compress and expand my files.

Chas

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Compression - How low can you go?

by kather0525 In reply to Compression - How low can ...

Chas !

Thanks again ! The previous suggestions are very good but your response included the option of archiving, which I was not aware of. PKZIP has an option for that, so I'll try using it.

Thanks again !

Kelly

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Compression - How low can you go?

by kather0525 In reply to Compression - How low can ...

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