Preview generator image size issue

🍱 Features & apps previewgenerator
1

Hello All.

I have been trying to configure preview generator on my RPI 4.
The first time i installed and ran preview generator app, it created fine previews. A bit too large in storage size however thumbnails were fitting well. After a few tweaks and changing the image sizes, the thumbnails are not fitting properly. Example is attached.

I used these settings and I can not seem to revert these settings at all:

occ config:app:set previewgenerator squareSizes --value="32 256"
occ config:app:set previewgenerator widthSizes --value="256 384"
occ config:app:set previewgenerator heightSizes --value="256"
occ config:system:set preview_max_x --value 2048
occ config:system:set preview_max_y --value 2048
occ config:system:set jpeg_quality --value 60
occ config:app:set preview jpeg_quality --value="60"

The Preview generator app generates previews of all sizes by default. I want that default setting again and re-generate previews so that i can have better thumbnails this time. Can someone please help me figure out how to revert these changes in preview generator and let it generate default sizes?

Thanks!

Screenshot 2021-03-29 132327
Screenshot 2021-03-29 1323271599Ă—480 45.9 KB

2

Have you tried to use occ config:app:delete ... to delete the custom set parameters? Ususally an app should use default values if no custom ones have been set.

3

When using:

sudo -u www-data php /var/www/nextcloud/occ config:app:delete previewgenerator squareSizes --value=“32 256”

I get this output:

The –value option does not exist.

Seems like delete option does not exist.

4

Tried this command and it worked:

sudo -u www-data php /var/www/nextcloud/occ config:app:delete previewgenerator squareSizes

Now what do I need to do in order to remove old previews and generate new ones with default sizes?

5

Yes that’s an expected result, if you don’t use the correct command syntax.

> ./occ config:app:delete --help
Description:
  Delete an app config value

Usage:
  config:app:delete [options] [--] <app> <name>

Arguments:
  app                        Name of the app
  name                       Name of the config to delete
...
6

Tried this command and it worked:

sudo -u www-data php /var/www/nextcloud/occ config:app:delete previewgenerator squareSizes

Now what do I need to do in order to remove old previews and generate new ones with default sizes?

7

What about deleting the content of the preview folder ([nc-data-directory]/appdata_xyz/preview) and re-running the preview generating command.

8

I tried it several times. Since I have data of around 50 GB, I re-run the preview generating command for about a minute or so and check the files it has created. I get the same output everytime.
However, now after I ran the occ config:app:delete command that you suggested, I hope for expected results. Will update you if its fixed now. Thank you!

9

No. All the rectangle (landscape) images appear double or triple in the thumbnails. Please let me know how to fix it. :weary:

10

You wanted to revert all settings to the default, so that’s now the desired result. If it doesn’t match your expectations you have to set custom values.