pdf2img | convert pdf to | Document Editor library
kandi X-RAY | pdf2img Summary
kandi X-RAY | pdf2img Summary
convert pdf to img,使用JS将PDF转换为图片,压缩成.zip下载,可直接在线查看demo!如有疑问,可通过个人主页邮箱联系。
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QUESTION
I want to convert the first page of pdf to an image. And my below code is working well in my local environment: Ubuntu 18. But when I run in the docker environment, it fails and raises:
wand.exceptions.WandRuntimeError: MagickReadImage returns false, but did raise ImageMagick exception. This can occurs when a delegate is missing, or returns EXIT_SUCCESS without generating a raster.
Am I missing a dependency? Or something else? I don't know what it's referring to as 'delegate'.
I saw the source code, it fails in here: wand/image.py::7873lines
ANSWER
Answered 2019-Jul-30 at 13:47I don't know what it's referring to as 'delegate'.
With ImageMagick, a 'delegate' refers to any shared library, utility, or external program that does the actual encoding & decoding of file type. Specifically, a file format to a raster.
Am I missing a dependency?
Most likely. For PDF, you would need a ghostscript
installed on the docker instance.
Or something else?
Possible, but hard to determine without an error message. The "WandRuntimeError" exception is a catch-all. It exists because a raster could not be generated from the PDF, and both Wand & ImageMagick can not determine why. Usually there would be an exception if the delegate failed, security policy message, or an OS error.
Best thing would be to run a few gs
commands to see if ghostscript is working correctly.
QUESTION
I am developing some Cloud Functions for Firebase, and one in particular does not work to an issue in one of the node modules on which my function depend.
I already found where is the issue and how to fix it, the problem is that, if I modify the source in node_modules/ folder, that update is not sent to the server. I removed from the package.json the dependency and did (before modify the file locally):
...ANSWER
Answered 2017-Apr-27 at 14:55Thanks to Mr.Phoenix hint, the solution is:
Fork the repository (or in my case, find a fork that already has the fix).
remove the previous version with:
npm uninstal --save pdf2img
- Install the new version from the fork with:
npm install --save git+https://git@github.com/matteocontrini/node-pdf2img
The problem in this specific case cannot be solved because the library relies on "gm" and other libraries that are not available in firebase functions
QUESTION
I have built a NodeJS express project on windows environment, and it running without any problems.
After I have finished I tried uploading the project to a Linux server to run.
Somewhy, after running "npm start" command, the project prints a new line which says:
"linux is NOT supported"
As you can see here:
I have tried searching with visual studio in entire project for this string but couldn't find which module does that problem.
Here is my package.json:
...ANSWER
Answered 2018-Aug-13 at 17:59After doing a long research for each of the dependencies and after trying to remove each of them separately, it turns out that 'pdf-poppler' was the one that doesn't support Linux.
QUESTION
I am working on import routines for node, so far I can import text nodes from a PDF using pdf2json, this works well, but doesn't work on PDF's that are image based and contain no text.
So I downloaded pdf2img, however there are plenty of issues with this module, the one I have now is that after running it, I get a lot of 0 byte png files created, no content and an error message:
...ANSWER
Answered 2017-May-06 at 16:01Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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