Problems with PDF docs: all blank!

Alfy · 11-14-2008, 10:23 AM

Hi everyone,

I am trying to upload some scanned RPG manuals to my PRS 505. They open fine on my Mac, both in PReview and i Acrobate Pro. But once transferred to the reader, when I open the docs, all I get is blank pages.

I've never had this bug with PDF before. Anyone had the same problem? Also, would anyone know if there's a limit on the size of the documents that can be read on the PRS 505: some of these manuals weight a hefty 45 MB!

Cheers!

Alfy.

Jim Lester · 11-14-2008, 10:35 AM

But do they open in Digital Editions? Neither Digital Editions or the Sony Reader support images in PDF that are in JPEG2000 format.

sealbeater · 11-14-2008, 12:11 PM

Quote:

Originally Posted by Alfy

Hi everyone,

I am trying to upload some scanned RPG manuals to my PRS 505. They open fine on my Mac, both in PReview and i Acrobate Pro. But once transferred to the reader, when I open the docs, all I get is blank pages.

I've never had this bug with PDF before. Anyone had the same problem? Also, would anyone know if there's a limit on the size of the documents that can be read on the PRS 505: some of these manuals weight a hefty 45 MB!

Cheers!

Alfy.

I've had that problem before. Try reformatting the flash memory (card or internal) and loading the pdfs one at a time. I've loaded pdfs that were over 200MB in size but it took some work.

Alfy · 11-14-2008, 02:44 PM

A-HA!!! When opened in ADE, same blank page! I'll try changing the compression format in Acrobat and see if that works.

THAAAAANKS!!!

Alfy · 11-14-2008, 02:51 PM

And resampling the pictures to JPEG instead of JPEG2000 works wonders! Again, THANKS!

Damn, this forum is good. Better than motorbikes. Better than drugs. Better than sex. Well, not better than sex, but still.

Alfy · 11-15-2008, 05:21 AM

Sorry to come back with a new question: would any one know how to change the compression type in Acrobat WITHOUT using PDF optimizer? If I use the optimizer, I have to downgrade the quality of the pictures...

Jim Lester · 11-17-2008, 08:19 PM

Nope sorry, that's the only way I know to change the filter type of the streams, outside of writing your own plugin.

DDHarriman · 11-18-2008, 08:13 AM

Alfy

You will always loose quality with these particular types of PDF’s, as you are changing the type of compression to jpeg who is lossless (so always with loosing of information).

You can minimize this by checking the level of compression of the file images before (if jpeg2000, see if it’s low, medium, high, etc…) and when changing to jpeg choose for this one at least the same level of compression or superior (ex: medium in jpeg2000, to high in jpeg).
And see the results.

Best regards,

JSWolf · 11-28-2008, 04:29 PM

Quote:

Originally Posted by DDHarriman

Alfy

You will always loose quality with these particular types of PDF’s, as you are changing the type of compression to jpeg who is lossless (so always with loosing of information).

Actually, lossless should be termed lossy. Jpeg is a lossy compression.

ProDigit · 11-29-2008, 08:41 PM

I've noted some books I converted are blank too.
Mainly ones saved as Adobe Acrobat 5 or higher files.
Acrobat 4 files don't seem to suffer from that.

Problem is on Acrobat 4 a book I converted is 6,5Mb
On version 6 it only takes 3MB.
On version 9 it takes 2,9MB.

It may be as you say,JPeg.
For scanned text books (before ocr)is png not better than jpeg?

11-14-2008, 10:23 AM	#1
Alfy Liseur de Bonne Aventure Posts: 374 Karma: 2176666 Join Date: Sep 2008 Location: Paris, France Device: PRS T1	Problems with PDF docs: all blank! Hi everyone, I am trying to upload some scanned RPG manuals to my PRS 505. They open fine on my Mac, both in PReview and i Acrobate Pro. But once transferred to the reader, when I open the docs, all I get is blank pages. I've never had this bug with PDF before. Anyone had the same problem? Also, would anyone know if there's a limit on the size of the documents that can be read on the PRS 505: some of these manuals weight a hefty 45 MB! Cheers! Alfy.

11-14-2008, 10:35 AM	#2
Jim Lester Evangelist Posts: 416 Karma: 14682 Join Date: May 2008 Location: SF Bay Area Device: Nook HD, Nook for Windows 8	But do they open in Digital Editions? Neither Digital Editions or the Sony Reader support images in PDF that are in JPEG2000 format. Last edited by Jim Lester; 11-14-2008 at 12:36 PM.

11-29-2008, 08:41 PM	#10
ProDigit Karmaniac Posts: 2,553 Karma: 11499146 Join Date: Oct 2008 Location: Miami FL Device: PRS-505, Jetbook, + Mini, +Color, Astak Ez Reader Pro, PPW1, Aura H2O	I've noted some books I converted are blank too. Mainly ones saved as Adobe Acrobat 5 or higher files. Acrobat 4 files don't seem to suffer from that. Problem is on Acrobat 4 a book I converted is 6,5Mb On version 6 it only takes 3MB. On version 9 it takes 2,9MB. It may be as you say,JPeg. For scanned text books (before ocr)is png not better than jpeg? Last edited by ProDigit; 11-29-2008 at 08:45 PM.

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11-14-2008, 02:44 PM	#4
Alfy Liseur de Bonne Aventure Posts: 374 Karma: 2176666 Join Date: Sep 2008 Location: Paris, France Device: PRS T1	A-HA!!! When opened in ADE, same blank page! I'll try changing the compression format in Acrobat and see if that works. THAAAAANKS!!!

11-14-2008, 02:51 PM	#5
Alfy Liseur de Bonne Aventure Posts: 374 Karma: 2176666 Join Date: Sep 2008 Location: Paris, France Device: PRS T1	And resampling the pictures to JPEG instead of JPEG2000 works wonders! Again, THANKS! Damn, this forum is good. Better than motorbikes. Better than drugs. Better than sex. Well, not better than sex, but still.

11-15-2008, 05:21 AM	#6
Alfy Liseur de Bonne Aventure Posts: 374 Karma: 2176666 Join Date: Sep 2008 Location: Paris, France Device: PRS T1	Sorry to come back with a new question: would any one know how to change the compression type in Acrobat WITHOUT using PDF optimizer? If I use the optimizer, I have to downgrade the quality of the pictures...

11-17-2008, 08:19 PM	#7
Jim Lester Evangelist Posts: 416 Karma: 14682 Join Date: May 2008 Location: SF Bay Area Device: Nook HD, Nook for Windows 8	Nope sorry, that's the only way I know to change the filter type of the streams, outside of writing your own plugin.

11-18-2008, 08:13 AM	#8
DDHarriman Guru Posts: 860 Karma: 4380 Join Date: Feb 2008 Location: Almada, Portugal Device: Cybook Gen3, Sony PRS 505, Kindle DXG and Samsung Galaxy Note	Alfy You will always loose quality with these particular types of PDF’s, as you are changing the type of compression to jpeg who is lossless (so always with loosing of information). You can minimize this by checking the level of compression of the file images before (if jpeg2000, see if it’s low, medium, high, etc…) and when changing to jpeg choose for this one at least the same level of compression or superior (ex: medium in jpeg2000, to high in jpeg). And see the results. Best regards,

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