[BUG] [paperless.parsing] Thumbnail generation with ImageMagick failed

[MrThiemann]

Description

when my files consumed, i became the error:
[2022-05-07 17:01:07,376] [WARNING] [paperless.parsing] Thumbnail generation with ImageMagick failed, falling back to ghostscript. Check your /etc/ImageMagick-x/policy.xml!

but not with every document, but felt like every third one... (always different)

Steps to reproduce

Scan document an uploaded this in /var/www/uploads
then i used a script that checked if a new file in "www" and then moved it to /opt/paperless/consume

Webserver logs

[WARNING] [paperless.parsing] Thumbnail generation with ImageMagick failed, falling back to ghostscript. Check your /etc/ImageMagick-x/policy.xml!

Paperless-ngx version

1.7.0

Host OS

Proxmox LXC Debian 11

Installation method

Bare metal

Browser

No response

Configuration changes

No response

Other

No response

[qcasey]

Thank you for reporting. Are you able to share any of these failing documents with us?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[x4FF3]

hi, installed my instance today. and also stumbled upon this.

[StanDaMan0505]

I also stumbled upon this warning in 1.9.2

Additionally, I found these messages in the log:
convert-im6.q16: cache resources exhausted /tmp/magick-YDw87kvL7kw7NvDUD81N2llf-TC2pS3y1' @ error/cache.c/OpenPixelCache/4095. convert-im6.q16: no images defined /tmp/paperless/paperless-0usybfvg/convert.webp' @ error/convert.c/ConvertImageCommand/3229.
[2022-11-24 07:47:06,692] [WARNING] [paperless.parsing] Thumbnail generation with ImageMagick failed, falling back to ghostscript. Check your /etc/ImageMagick-x/policy.xml!

[nsar1907]

I also stumbled upon this warning in 1.9.2

[2022-11-28 04:36:32,768] [WARNING] [paperless.parsing] Thumbnail generation with ImageMagick failed, falling back to ghostscript. Check your /etc/ImageMagick-x/policy.xml!

[halfbyte]

I've looked at the file that gets mentioned and I think this might be a hint:

<!-- disable ghostscript format types -->
  <policy domain="coder" rights="none" pattern="PS" />
  <policy domain="coder" rights="none" pattern="PS2" />
  <policy domain="coder" rights="none" pattern="PS3" />
  <policy domain="coder" rights="none" pattern="EPS" />
  <policy domain="coder" rights="none" pattern="PDF" />
  <policy domain="coder" rights="none" pattern="XPS" />

This is from a yunohost paperless-ngx installation. I am no expert in ImageMagick config, but that sounds to me as if it would prevent convert from reading these file types?

[lordyod]

Hi, this should probably not be closed. Just did a fresh baremetal install, consumed ~1200 docs, every single one gives this error.

Additionally, when I try to use the admin document_thumbnails tool I get the following:

root@paperless:/opt/paperless/src# sudo -u paperless ../venv/bin/python3 manage.py document_thumbnails
  0%|                                                                                                                                                                                       | 0/1169 [00:00<?, ?it/s]convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/741.
convert: no images defined `/tmp/paperless/paperless-gkkqedz2/convert.webp' @ error/convert.c/ConvertImageCommand/3342.
convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/741.
convert: no images defined `/tmp/paperless/paperless-1cd9zbji/convert.webp' @ error/convert.c/ConvertImageCommand/3342.
convert: no decode delegate for this image format `' @ error/constitute.c/ReadImage/741.
convert: no images defined `/tmp/paperless/paperless-rctsafwu/convert.webp' @ error/convert.c/ConvertImageCommand/3342.
convert: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/741.
convert: no images defined `/tmp/paperless/paperless-1cd9zbji/convert_gs.webp' @ error/convert.c/ConvertImageCommand/3342.
convert: no decode delegate for this image format `PNG' @ error/constitute.c/ReadImage/741.
convert: no images defined `/tmp/paperless/paperless-gkkqedz2/convert_gs.webp' @ error/convert.c/ConvertImageCommand/3342.

[HolgerM1]

Same her on paperless-ngx 1.13:
[WARNING] [paperless.parsing] Thumbnail generation with ImageMagick failed, falling back to ghostscript. Check your /etc/ImageMagick-x/policy.xml!
This was happening on importing a bunch of PDFs I exported from my former DMS.
Is anybody having an idea if this impacts the functionality?

[MortRainey]

https://docs.paperless-ngx.com/setup/

Point 13 did it for me:

Configure ImageMagick to allow processing of PDF documents. Most distributions have this disabled by default, since PDF documents can contain malware. If you don't do this, paperless will fall back to ghostscript for certain steps such as thumbnail generation.

Edit /etc/ImageMagick-6/policy.xml and adjust
policy domain="coder" rights="none" pattern="PDF"
to
policy domain="coder" rights="read|write" pattern="PDF"

on bare matel Installation.

[HolgerM1]

Unfortunateley II do not have an folder "/etc/ImageMagik-6"?!

[ndom91]

Just ran into this too on a fresh bare-metal install of 1.14.0-beta.rc1 on a fresh Ubuntu 22.04.

Looks like you might have to just remove this line from the aforementioned /etc/ImageMagik-6/policy.xml to allow it to run on PDFs

<policy domain="coder" rights="none" pattern="PDF" />

[github-actions]

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