file and folder compression good for large (5GB) files?

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cyr0n_k0r

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If this is in the wrong forum sorry, this question is kinda tricky in where it goes.

But I have a 300GB hard drive for my DVD archive and was wondering if enableing file and folder compression would be a good idea for these large (4Gb - 10Gb) image files.

The way I read the file and folder compressions works is that windows only opens and decompresses the part of the file your working with.. so would this be good for large DVD images?
 
Yes and no. Windows file and folder compression is alright, but if all the files you need to compress are video, there's a very good chance you won't gain much space from it. A more aggressive compression scheme would probably give you some good compression rates on such uncompressed video as on a DVD ISO but that isn't really suitable for your purposes (it'd be like .zip or .rar); it'd bog down performance like nobody's business.
 
Neurofreeze said:
good compression rates on such uncompressed video as on a DVD ISO but that isn't really suitable for your purposes (it'd be like .zip or .rar); it'd bog down performance like nobody's business.
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Two things wrong with this picture. ZIP et al compression is lossless - you get out precisely what you put in; otherwise it'd be really bad for executables, your thesis, that kind of thing. The extra bits have to go somewhere, and they do - into the .zip file. So you won't gain much by putting an uncompressed .avi through winzip as compared to divx or an mpeg2 compressor.

The other problem is that DVD is compressed audio (ac3 or dts usually) and compressed video (mpeg2). If you have an iso file (rather than .vob, .ifo, etc), that'll compress a little bit, but it's essentially the vob files with a little bit of overhead.

 
Not good at all. I wouldn't even bother.

If you're worried about space...buy another disk. $100 will buy you another 300GB soon enough.
 
Just for curiosity-sake, i'm RAR'ing a DVD-rip, it's not an ISO but rather just a collection of VOB files and whatnot, setting are on maximum compression/solid archive. I'm also RAR'ing an SVCD ISO file, same settings. Off to bed, results in the morning
 
Original size: 4.35 GB (4,680,841,216 bytes)
Compressed: 4.01 GB (4,311,180,235 bytes)

Original size: 804 MB (843,787,056 bytes)
Compressed: 763 MB (800,572,302 bytes)


The VOB files obviously compress a bit more than the SVCD ISO, but either way it's not worth the time. It took a few hours to compress :p
 
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