Is It Possible To Convert Epub Files 40 MB And Above - Page 2

DNSB · 08-01-2019, 10:13 PM

Quote:

Originally Posted by lumpynose

I'm tempted to load it onto my kobo and see if it crashes it.

Remember to rename from whatever.epub to whatever.fxl.kepub.epub to let your Kobo know that you are viewing a fixed layout epub3. I skipped through much of the publication and it's didn't crash my Clara HD.

DNSB · 08-02-2019, 01:08 AM

Quote:

Originally Posted by lumpynose

[I]I opened it in Sigil and its previewer displays it nicely. Likewise with Adobe Digital Editions. And Calibre's viewer. But the font size is fixed and small so it's hard to read.

For the file I downloaded (Made in China Yearbook 2018: Dog Days), while I found that it opened in Sigil and either Preview or PageEdit displayed the page more or less correctly, when I used calibre's viewer, the page did not display correctly. I've attached an snippet of the same page that was displayed on my Clara HD showing how calibre's viewer displayed it for me.

MrSlow&Steady · 08-02-2019, 01:15 AM

Quote:

Originally Posted by DNSB

What format are you attempting to convert to?

Never mind. Tried to do PDF --> Epub but alas they always come out bad.

Quote:

Originally Posted by lumpynose

Every word in it is absolutely positioned; e.g.

Code:

<span id="_idTextSpan4945" class="CharOverride-19" style="position:absolute;top:6584.25px;left:1986.07px;letter-spacing:-0.13px;">unprecedented </span>

So I don't think it's the size but all of that html stuff. Like DNSB said, another approach would more likely be fruitful. Maybe figure out a way to strip out the spans around each word, and then start over reformatting it.

I opened it in Sigil and its previewer displays it nicely. Likewise with Adobe Digital Editions. And Calibre's viewer. But the font size is fixed and small so it's hard to read.

I'm tempted to load it onto my kobo and see if it crashes it.

Not sure how to do that without screwing up the whole thing though.

DNSB · 08-02-2019, 05:36 AM

Quote:

Originally Posted by MrSlow&Steady

Not sure how to do that without screwing up the whole thing though.

Do you have a Kobo ereader? If so, you can try the file rename suggested in my reply to lumpynose a couple of messages back.

JSWolf · 08-02-2019, 07:43 AM

@MrSlow&Steady

The solution is to read the PDF on a tablet if you have one or on your computer. Forget trying to read it on your Kindle. That's not going to happen.

lumpynose · 08-02-2019, 03:45 PM

Quote:

Originally Posted by DNSB

For the file I downloaded (Made in China Yearbook 2018: Dog Days), while I found that it opened in Sigil and either Preview or PageEdit displayed the page more or less correctly, when I used calibre's viewer, the page did not display correctly. I've attached an snippet of the same page that was displayed on my Clara HD showing how calibre's viewer displayed it for me.

It looked like that for me when I zoomed in with Calibre's viewer. I left it zoomed and then the next book I opened had huge text and that made me wonder if there's a way to reset its zoom.

lumpynose · 08-02-2019, 03:46 PM

Quote:

Originally Posted by MrSlow&Steady

Not sure how to do that without screwing up the whole thing though.

True, the formatting will be gone but at least the words will be in the correct order. With a pdf it's a gamble as to the word order being maintained.

DNSB · 08-02-2019, 04:22 PM

Just as an FYI, the conversion from epub to azw3 for Dog Days completed after 13 hours. The average CPU use was pretty steady around 22%, memory use maxed out at 15.6GB. The computer used is a quad core I7 with 32GB of memory and a NVMe SSD.

After conversion, I opened the azw3 in the Kindle desktop app for Windows. It managed to look worse than the epub opened in ADE 2.0.1.

MrSlow&Steady · 08-02-2019, 06:09 PM

Quote:

Originally Posted by DNSB

Just as an FYI, the conversion from epub to azw3 for Dog Days completed after 13 hours. The average CPU use was pretty steady around 22%, memory use maxed out at 15.6GB. The computer used is a quad core I7 with 32GB of memory and a NVMe SSD.

After conversion, I opened the azw3 in the Kindle desktop app for Windows. It managed to look worse than the epub opened in ADE 2.0.1.

I owe you for taking one for the team.

lumpynose · 08-02-2019, 06:19 PM

Quote:

Originally Posted by MrSlow&Steady

I owe you for taking one for the team.

DNSB is hardcore!

DNSB · 08-03-2019, 12:07 AM

Quote:

Originally Posted by MrSlow&Steady

I owe you for taking one for the team.

Much more it was just simple morbid curiosity as to (1) how long the conversion would take/if it would ever finish and (2) if I had finally found a task for calibre that try to use more RAM than available.

MrSlow&Steady · 08-03-2019, 05:06 PM

Quote:

Originally Posted by lumpynose

DNSB is hardcore!

Yep he is.

Quote:

Originally Posted by DNSB

Much more it was just simple morbid curiosity as to (1) how long the conversion would take/if it would ever finish and (2) if I had finally found a task for calibre that try to use more RAM than available.

Which ended in failure, from what I read.

DNSB · 08-03-2019, 09:50 PM

Quote:

Originally Posted by MrSlow&Steady

Which ended in failure, from what I read.

Yeah, I didn't manage to run out of RAM. The output azw3 file being pretty craptacular was more or less expected. Fixed layout epub3 are about the only format that is worse than pdf when it comes to converting to other formats.

lumpynose · 08-03-2019, 11:53 PM

Quote:

Originally Posted by DNSB

Yeah, I didn't manage to run out of RAM. The output azw3 file being pretty craptacular was more or less expected. Fixed layout epub3 are about the only format that is worse than pdf when it comes to converting to other formats.

I tried it for a little while on my system until I forgot and let it go to sleep, throwing off the timing. The ram usage was always low. For cpu usage it was only 1 thread which was maxed. Made me wonder if Calibre could use multiple threads and do the html files in parallel, sort of like it does when you convert several books at once.

DNSB · 08-04-2019, 03:56 PM

Quote:

Originally Posted by lumpynose

I tried it for a little while on my system until I forgot and let it go to sleep, throwing off the timing. The ram usage was always low. For cpu usage it was only 1 thread which was maxed. Made me wonder if Calibre could use multiple threads and do the html files in parallel, sort of like it does when you convert several books at once.

Not sure but on my setup, it was using all eight cores when I changed the graph from overall usage to logical processors.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Convert 37 Files into 1 epub	Solo1959	Conversion	14	05-07-2015 12:16 AM
Txt files - Convert to Epub - Multiple files into one book - noob help	Cernan	Calibre	6	05-18-2010 10:12 AM

08-02-2019, 07:43 AM	#20
JSWolf Resident Curmudgeon Posts: 79,856 Karma: 146918083 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	@MrSlow&Steady The solution is to read the PDF on a tablet if you have one or on your computer. Forget trying to read it on your Kindle. That's not going to happen.

08-02-2019, 04:22 PM	#23
DNSB Bibliophagist Posts: 46,648 Karma: 169712392 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Just as an FYI, the conversion from epub to azw3 for Dog Days completed after 13 hours. The average CPU use was pretty steady around 22%, memory use maxed out at 15.6GB. The computer used is a quad core I7 with 32GB of memory and a NVMe SSD. After conversion, I opened the azw3 in the Kindle desktop app for Windows. It managed to look worse than the epub opened in ADE 2.0.1.

Advert

Advert