On Sunday 02 Feb 2003 2:41 pm, Adolfo Bello wrote: > For archiving purpose, you can achieve both high quality and high > compression using tar and gzip or bzip2. > > tar -cjf filename.tar.bz2 filename.pnm > > Compressed size to original size ratio will vary, being 1/3 a rough mean > value for raw pnm and bzip2. > > Only drawback is that you will need to decompress it before using any > graphic program.
Following this with interest, as I have the same interest as John. It may be worth experimenting with this, John, as Ark will allow us to look inside the archive and just extract one file. But it doesn't get round the question of future-proofing, I think. Tar has been around a long time, but like John, I'm apprehensive about file formats of the future, and like him, I tend to think that the best provision will be for the formats most used, which is why I tend to end up with an uncompressed file in case of future editing and a jpg file for general use. Anne -- Registered Linux User No.293302
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