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Old 11-18-2011, 04:04 AM   #1
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zip, zipx rar etc
i know calibre can handle (legacy) zip files.

any plans to support zipx and/or to support other compressed formats like rar, 7z....
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Old 11-18-2011, 04:10 AM   #2
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calibre handles rar. No plans for any other formats.
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Old 11-18-2011, 08:45 AM   #3
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calibre handles rar. No plans for any other formats.
OK -
.rar is an undocumented feature , or did I miss something?
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Old 11-18-2011, 09:02 AM   #4
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I am surprised if it is undocumented. It is very widely used to pass books around as when you add a rar to Calibre it will automatically extract any (single) ebook file and add it in extracted form. That functionality has been there for years.

The ZIP format tends to be used primarily to store HTML books - although Calibre does not mandate that usage as compulsory.
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Old 11-18-2011, 09:27 AM   #5
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i guess .rar is only 1/2 supported actually i.e. - as "read from" but not as "convert to"... leastways it's not on the drop down choices
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Old 11-18-2011, 10:12 AM   #6
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Originally Posted by cybmole View Post
i guess .rar is only 1/2 supported actually i.e. - as "read from" but not as "convert to"... leastways it's not on the drop down choices
RAR is not a format. It is a Archiver (think wrapper)
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Old 11-18-2011, 10:13 AM   #7
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But surely unless some device or program NEEDS books in RAR format, why would you havea convert to RAR option?
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Old 11-18-2011, 10:34 AM   #8
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But surely unless some device or program NEEDS books in RAR format, why would you havea convert to RAR option?
Many devices tolerate Rar or Zip wrapped formats.
EPUB is a Zip with a very exacting set of files and relationships within.
You can un-zip a EPUB (putting it back together correctly is trickier)
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Old 11-18-2011, 11:39 AM   #9
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RAR is not a format. It is a Archiver (think wrapper)
by that definition, ZIP is not a format either, yet is on the formats list.
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Old 11-18-2011, 11:41 AM   #10
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But surely unless some device or program NEEDS books in RAR format, why would you havea convert to RAR option?
no idea - just nitpicking - though some folks could argue that RAR compression is better than ZIP.

so (trolling) why have a convert to ZIP option - what device needs books in ZIP ?
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Old 11-18-2011, 01:26 PM   #11
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The ZiP format is really HTML when converting. Calibre can only store one file per format, and since an HTML eBook always has multiple files ZIP is elected as the format to store the HTML related files.
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Old 11-18-2011, 01:28 PM   #12
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no idea - just nitpicking - though some folks could argue that RAR compression is better than ZIP.

so (trolling) why have a convert to ZIP option - what device needs books in ZIP ?
Any multi-part book needs to be wrapped (ie. HTML w/images,CSS,fonts)
RAR is a better encoding. It also takes more crunch power which may be too much for a wimpy device
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Old 11-18-2011, 04:46 PM   #13
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Any multi-part book needs to be wrapped (ie. HTML w/images,CSS,fonts)
RAR is a better encoding. It also takes more crunch power which may be too much for a wimpy device
That's not the only issue. If I remember correctly, RAR is a proprietary format. The license allows for using the extraction portion freely but I think you're not allowed to make a program that creates RAR archives. 7z support sure would be nice since it's a lot more efficient at compressing a bunch of text files. Darned slow, though. It's the one app I regularly use which makes full use of my quad-core i7 CPU.
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Old 11-18-2011, 10:01 PM   #14
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That's not the only issue. If I remember correctly, RAR is a proprietary format. The license allows for using the extraction portion freely but I think you're not allowed to make a program that creates RAR archives. 7z support sure would be nice since it's a lot more efficient at compressing a bunch of text files. Darned slow, though. It's the one app I regularly use which makes full use of my quad-core i7 CPU.
"RAR is a proprietary format. " - good point - have owned winzip, winrar for so long I forgot about that. same would apply to zipx I guess
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