Solved Nextcloud pdf and video preview

[byspy]

Hi to everybody, I need to enable preview PDF and Video on my Nextcloud.
I need to execute this command:

apt install ffmpeg imagemagick ghostscript

and this

nano /etc/ImageMagick-6/policy.xml

to change some parameter.

If I try to execute: apt install ffmpeg imagemagick ghostscript

I receive this message:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package ghostscript is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package ffmpeg is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

W: Not using locking for read only lock file /var/lib/dpkg/lock
E: Package 'ffmpeg' has no installation candidate
E: Package 'ghostscript' has no installation candidate

[nebulon]

Welcome! On Cloudron all apps run on a read-only filesystem, this means apt cannot install additional package. This is on purpose actually. We have to include such dependencies in the app package itself. I will see how this can be done with the next Nextcloud package release. Do you know how I can test that your desired functionality works then?

[byspy]

I can show you:
This image Is without the mod in Nextcloud Cloudron:

And this image show how it work in my Nextcloud:

With the mod you can see a preview of PDF, Image and if you want OFFICE ecc... (but I do not need)

[byspy]

I have follow this guide:
https://www.allerstorfer.at/nextcloud-install-preview-generator/
and
https://www.allerstorfer.at/imagemagick-fix-policymap/

Thats all

[nebulon]

Thanks for the reply. I have created an issue with the app package repo, so we can fix this with the next package release https://git.cloudron.io/cloudron/nextcloud-app/issues/74

[girish]

Had a look at this issue now. Nextcloud enable_previews setting is true by default - https://docs.nextcloud.com/server/18/admin_manual/configuration_server/config_sample_php_parameters.html#previews . In a new installation, I can see thumbnails generated for images and text documents. PDF and Document previews are not generated as outlined in the docs.

[girish]

For PDF previews, please follow the docs - https://cloudron.io/documentation/apps/nextcloud/#previews

[byspy]

@girish thank you. work like a charm.

[jdaviescoates]

@byspy did you manage to sort video previews too?

[girish]

@jdaviescoates It seems to work here atleast. What video file are you trying?

[jdaviescoates]

@girish oh, no particular video file, but given you said in Nextcloud pdf and video preview:

For PDF previews, please follow the docs - https://cloudron.io/documentation/apps/nextcloud/#previews

I wasn't sure if that covered video too (and not just PDF as mentioned), but now actually looking at that link I see that it includes the code for loads of different previews, thanks, I'll give it a try!

[byspy]

I have only PDF and video MP4 and work perfect.

[jdaviescoates]

@girish said in Nextcloud pdf and video preview:

For PDF previews, please follow the docs - https://cloudron.io/documentation/apps/nextcloud/#previews

Whilst trying to paste that code in I've managed to mess up my config file (and stupidly didn't download a copy beforehand).

Easiest way to get it back to original state?

Thanks!

[jdaviescoates]

@jdaviescoates said in Nextcloud pdf and video preview:

Easiest way to get it back to original state?

I restored a backup from 8 hours ago.

Now to try again... But asting into the web console doesn't seem to work properly (perhaps a bug?), so will try downloading, editing and then uploading or something...

[jdaviescoates]

All sorted now