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Old 01-31-2013, 09:21 AM   #1
asacamano
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Calibre Companion PDF Corruption

Hi,

Generally, I've had lots of success with Calibre Companion, but I have a few (not all) PDFs which get corrupted in the "Send to device" process.

When I open the content server in Calibre, I can download the files into (e.g.) MoonReader and open it just fine, but when I send the PDFs to Calibre Companion wirelessly, the resulting file in unreadable in MoonReader, Adobe's PDF Reader, and a few other apps. They all describe the file as "damanged or corrupted".

I compared the file in Calibre_Companion on the device with the file in my local Calibre library (using WiFi File Browser to transfer it), and they are different sizes, and have different content (see below):

cksum working.pdf broken.pdf
2897500834 619196 working.pdf
4245409161 616740 broken.pdf

Just to really mix things up, both PDFs are openable, and appear to work fine on my mac laptop - it's only on the mobile device that

So my question is how can I get the PDF file to be transferred without any processing.

Thanks in advance for any advice,

Andrew

P.S. For what it's worth:

Calibre 0.9.16 on OS X 10.8.2
Calibre Companion 2.7.1 on Android 4.0.4 (Galaxy Tab 10.1 GT-P7510)


Beginning of working PDF (od -tx1 -c)
0000000 25 50 44 46 2d 31 2e 33 0a 25 c4 e5 f2 e5 eb a7
% P D F - 1 . 3 \n % 304 345 362 345 363 247
0000020 f3 a0 d0 c4 c6 0a 32 20 30 20 6f 62 6a 0a 3c 3c
363 240 320 304 306 \n 2 0 o b j \n < <
0000040 20 2f 4c 65 6e 67 74 68 20 34 20 30 20 52 20 2f
/ L e n g t h 4 0 R /
0000060 46 69 6c 74 65 72 20 2f 46 6c 61 74 65 44 65 63
F i l t e r / F l a t e D e c
0000100 6f 64 65 20 3e 3e 0a 73 74 72 65 61 6d 0a 78 da
o d e > > \n s t r e a m \n x 355
0000120 ed 5d 59 8f e4 c8 71 7e cf 5f c1 c7 15 30 2a e5
355 ] Y 217 344 310 q ~ 317 _ 301 307 025 0 * 175
0000140 7d 58 4f de c5 ca 5e 40 b2 6c ec 00 03 03 fb d2
} X O 336 305 312 ^ @ 262 l 354 \0 003 003 373 335




Beginning of broken PDF
0000000 25 50 44 46 2d 31 2e 33 0a 25 e2 e3 cf d3 0a 31
% P D F - 1 . 3 \n % 342 343 317 323 \n 1
0000020 20 30 20 6f 62 6a 3c 3c 2f 54 79 70 65 2f 50 61
0 o b j < < / T y p e / P a
0000040 67 65 2f 43 6f 6e 74 65 6e 74 73 20 32 20 30 20
g e / C o n t e n t s 2 0
0000060 52 2f 4d 65 64 69 61 42 6f 78 5b 20 30 20 30 20
R / M e d i a B o x [ 0 0
0000100 36 31 32 20 37 39 32 5d 2f 50 61 72 65 6e 74 20
6 1 2 7 9 2 ] / P a r e n t
0000120 39 20 30 20 52 2f 52 65 73 6f 75 72 63 65 73 20
9 0 R / R e s o u r c e s
0000140 33 20 30 20 52 3e 3e 0a 65 6e 64 6f 62 6a 0a 32
3 0 R > > \n e n d o b j \n 2
0000160 20 30 20 6f 62 6a 3c 3c 2f 46 69 6c 74 65 72 2f
0 o b j < < / F i l t e r /
0000200 46 6c 61 74 65 44 65 63 6f 64 65 2f 4c 65 6e 67
F l a t e D e c o d e / L e n g
0000220 74 68 20 39 39 31 39 3e 3e 0a 73 74 72 65 61 6d
t h 9 9 1 9 > > \n s t r e a m
0000240 0a 78 da ed 5d 59 8f e4 c8 71 7e cf 5f c1 c7 15
\n x 332 355 ] Y 217 344 310 q ~ 317 _ 301 307 025
0000260 30 2a e5 7d 58 4f de c5 ca 5e 40 b2 6c ec 00 03
0 * 345 } X O 336 305 312 ^ @ 262 l 354 \0 003
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Old 01-31-2013, 09:48 AM   #2
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Welcome to MobileRead.

Quote:
Originally Posted by asacamano View Post
Generally, I've had lots of success with Calibre Companion, but I have a few (not all) PDFs which get corrupted in the "Send to device" process.

When I open the content server in Calibre, I can download the files into (e.g.) MoonReader and open it just fine, but when I send the PDFs to Calibre Companion wirelessly, the resulting file in unreadable in MoonReader, Adobe's PDF Reader, and a few other apps. They all describe the file as "damanged or corrupted".
What you are describing seems to be a calibre problem. The difference between the content server (which you can connect to with Calibre Companion also) and Send to device (which is used for transferring to any device including Calibre Companion) is that Send to device updates the PDF metadata when transferring to the device. So the file should be a different size when using Send to device versus using the content server, but it should work fine. The fact that it doesn't work indicates a problem and you should submit a bug report.

As a work around, until a solution is found, you can stop the PDF metadata update by going to Preferences - Plugins - Metadata writer plugins - select Set PDF metadata and click the Enable/Disable plugin button to disable the plugin and you should be fine.

Last edited by DoctorOhh; 01-31-2013 at 09:53 AM.
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Old 02-01-2013, 09:30 AM   #3
asacamano
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Thank DoctorOhh,

Your suggestion worked perfectly! I will submit a bug as you suggested.

Many thanks,

Andrew
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