#25 Outputs only blank pages.

[Claus]

Hi. I am trying to use pdfsandwich, but get nothing but white pages. Thinking I did something wrong, I tried using your own alice.pdf file, with the same result, only white pages. Which got me thinking something was broken. With my own files, I tried nopreproc, specifying the layout, language and such, to no avail. When installing, it went though without missing dependencies.

Here is the output:

User@User:~/Downloads/folder$ pdfsandwich alice.pdf
pdfsandwich version 0.1.7
Input file: "alice.pdf"
Output file: "alice_ocr.pdf"
Number of pages in inputfile: 14

Parallel processing with 4 threads started.
Processing page order may differ from original page order.

Processing page 5.
Processing page 12.identify -format "%w\n%h\n"  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[4]" 
Processing page 9.
identify -format "%w\n%h\n"  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[8]" 

Pidentify -format "%w\n%h\n"  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[11]" 
rocessing page 1.
identify -format "%w\n%h\n"  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[0]" 
identify: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
Warning: could not determine page size; defaulting to A4.
identify: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
Warning: could not determine page size; defaulting to A4.
identify: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
Warning: could not determine page size; defaulting to A4.
identify: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
Warning: could not determine page size; defaulting to A4.
convert: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
convert: no images defined `/tmp/pdfsandwich_tmpa5551b/pdfsandwich4358cb.pbm' @ error/convert.c/ConvertImageCommand/3210.
ERROR: Command "convert -units PixelsPerInch  -type Bilevel -density 300x300  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[8]" /tmp/pdfsandwich_tmpa5551b/pdfsandwich4358cb.pbm" failed. 
Terminating pdfsandwich. All temporary files are kept.
User@User:~/Downloads/folder$ convert: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
convert: no images defined `/tmp/pdfsandwich_tmpa5551b/pdfsandwich171af3.pbm' @ error/convert.c/ConvertImageCommand/3210.
convert: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
convert: no images defined `/tmp/pdfsandwich_tmpa5551b/pdfsandwich3306f8.pbm' @ error/convert.c/ConvertImageCommand/3210.
convert: not authorized `/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf' @ error/constitute.c/ReadImage/412.
convert: no images defined `/tmp/pdfsandwich_tmpa5551b/pdfsandwicheb5cd2.pbm' @ error/convert.c/ConvertImageCommand/3210.

Here it just stops, looks like it is not exiting properly.
The same problem with convert is present, when trying other pdf's, and nopreproc, and such.

ERROR: Command "convert -units PixelsPerInch  -type Bilevel -density 300x300  "/tmp/pdfsandwich_tmpa5551b/pdfsandwich_inputfile501d10.pdf[8]" /tmp/pdfsandwich_tmpa5551b/pdfsandwich4358cb.pbm" failed.

Please do say, if you need any other documentation.

[Tobias Elze]

Hi, this looks like an ImageMagick problem and might be a duplicate of Bug #22: On some systems, ImageMagick has not enough permissions to deal with pdf files. You can easily fix this. Look, for instance, here:

https://stackoverflow.com/questions/42928765/convertnot-authorized-aaaa-error-constitute-c-readimage-453

Does that help?

[Claus]

Thank you that did the trick, and your program works beautifully!