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Multipage TIFFs thumbnails don't work correctly
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Description

By multipage TIFFs the thumbnails are sometimes not generated correctly. The first thumbnail is always generated but the following are not. Maybe a problem by big size files.

Examples:
https://commons.wikimedia.org/wiki/File:UBBasel_Map_1569_Kartenslg_AA_3-5.tif
https://commons.wikimedia.org/wiki/File:UBBasel_Map_1572_Kartenslg_AA_8-10_Europa.tiff

Event Timeline

Micha claimed this task.
Micha raised the priority of this task from to Medium.
Micha updated the task description. (Show Details)

It is not a copy of https://phabricator.wikimedia.org/T87318 because they are real multipage tiffs.

@Micha: I assume you plan to work on this task as you assigned it to yourself and set a priority.
As this task was marked as a duplicate of T117349, please feel free to also assign T117349 to yourself if you plan to fix that problem. Thanks!