Conversion from CHM takes aaaaaaaaaaaages

jesuslatschen · 03-12-2011, 05:38 PM

Good evening,

I am trying to convert some 20+ CHM ebooks to mobi-files. Problem is, the conversion takes ages, some books with 100 pages more than an hour. Converting PDFs of the same size takes two minutes. And a conversion with other tools from CHM to HTML maybe less than 30 seconds.

How could I speed up the conversion to HTML process? I have found a html converter, but it splits it into several files which calibre can't read

user_none · 03-12-2011, 07:26 PM

There isn't anything you can do. Just wait for it to complete.

jesuslatschen · 03-12-2011, 07:33 PM

Hi,

hm, ok, that's less than desirable. Some books don't work properly, so you need to convert with different settings and so on, I'll spend a week or so converting them. Is there another way, with a 3rd-party-converter or something?

Manichean · 03-13-2011, 09:19 AM

You mentioned another tool that does CHM->HTML. Use that, import the HTML and convert from that.

DoctorOhh · 03-13-2011, 09:44 AM

Quote:

Originally Posted by jesuslatschen

How could I speed up the conversion to HTML process? I have found a html converter, but it splits it into several files which calibre can't read

As long as there is a TOC or index page from the conversion then calibre should handle the multi-part html without a problem. Just drag the TOC or index to calibre and calibre will grab up the other pages/images in the directory and package them as a zip file that calibre can convert to any other format.

jesuslatschen · 03-13-2011, 05:12 PM

Tried so, but to no avail. That's why I was asking here.

Besides that, it seems like the problem lies in the conversion from html to whatever format. As CHM is also just compiled html, this seems reasonable.

DoctorOhh · 03-13-2011, 09:45 PM

Quote:

Originally Posted by jesuslatschen

Besides that, it seems like the problem lies in the conversion from html to whatever format. As CHM is also just compiled html, this seems reasonable.

The problem with the conversion taking ages to complete is not a CHM problem. Long conversion times often exist for any html based (ePub, html, Mobi, Lit) format that started its life as a MS Word file and was saved without the filter option. These files typically have 10s of thousands of lines of embedded CSS that needs to be sorted through and applied. Add to this the complexity of many documents and I have seen ePub conversions take up to 6 hours. Fortunately this is the exception and not the rule.

Archon · 03-14-2011, 11:43 AM

Start the conversions right before you go to bed or work.

Then you won't have to wait and they will be done when you come back to the computer.

Don't add to your angst, walk away from it.

Happy Monday

03-12-2011, 05:38 PM	#1
jesuslatschen Junior Member Posts: 3 Karma: 10 Join Date: Mar 2011 Device: kindle	Conversion from CHM takes aaaaaaaaaaaages Good evening, I am trying to convert some 20+ CHM ebooks to mobi-files. Problem is, the conversion takes ages, some books with 100 pages more than an hour. Converting PDFs of the same size takes two minutes. And a conversion with other tools from CHM to HTML maybe less than 30 seconds. How could I speed up the conversion to HTML process? I have found a html converter, but it splits it into several files which calibre can't read

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03-12-2011, 07:26 PM	#2
user_none Sigil & calibre developer Posts: 2,487 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	There isn't anything you can do. Just wait for it to complete.

03-12-2011, 07:33 PM	#3
jesuslatschen Junior Member Posts: 3 Karma: 10 Join Date: Mar 2011 Device: kindle	Hi, hm, ok, that's less than desirable. Some books don't work properly, so you need to convert with different settings and so on, I'll spend a week or so converting them. Is there another way, with a 3rd-party-converter or something?

03-13-2011, 09:19 AM	#4
Manichean Wizard Posts: 3,130 Karma: 91256 Join Date: Feb 2008 Location: Germany Device: Cybook Gen3	You mentioned another tool that does CHM->HTML. Use that, import the HTML and convert from that.

03-13-2011, 05:12 PM	#6
jesuslatschen Junior Member Posts: 3 Karma: 10 Join Date: Mar 2011 Device: kindle	Tried so, but to no avail. That's why I was asking here. Besides that, it seems like the problem lies in the conversion from html to whatever format. As CHM is also just compiled html, this seems reasonable.

03-14-2011, 11:43 AM	#8
Archon Zealot Posts: 110 Karma: 5176 Join Date: Dec 2010 Device: Mac OSX, iPad, iPod, & Nook	Start the conversions right before you go to bed or work. Then you won't have to wait and they will be done when you come back to the computer. Don't add to your angst, walk away from it. Happy Monday

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