Non-rendering of thumbnail of compressed pdf in Commons
Open, Needs TriagePublic

Description

The file https://commons.wikimedia.org/wiki/File:Montazem_Naseri.pdf was uploaded with high compression, size 25.5 MB. The file did not display (jpg preview, thumbnail, next page option -- nowhere). Then I decompressed it to 178.68 MB and overwrote the previous file. Now it displays. The thumbnail of the previous file is still not visible.

Related Objects

StatusAssignedTask
OpenNone
OpenNone
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJun 12 2018, 1:20 AM

Cannot reproduce; the images are displayed for me. Which specific ones are missing? Links welcome. :)

The preview is visible now after my overwrite. But please see the upload log. The thumbnail of the original version (compressed pdf) is not visible.

Restricted Application added a project: Multimedia. · View Herald TranscriptJun 12 2018, 10:02 AM

The first version uploaded wasn't displaying thumbnail pages—choosing whichever you wanted, tried and confirmed at random pages—and this was either directly in the File: at Commons, or when viewed through some of the variations available at the Wikisources.

I have a similar problem with this file: https://commons.wikimedia.org/wiki/File:An_Anglo-Chinese_Vocabulary_of_the_Ningpo_Dialect.pdf
The thumbnail is not displayed even though the file is readable after being downloaded.

Vvjjkkii renamed this task from Non-rendering of thumbnail of compressed pdf in Commons to 67aaaaaaaa.Jul 1 2018, 1:04 AM
Vvjjkkii triaged this task as High priority.
Vvjjkkii updated the task description. (Show Details)
Vvjjkkii removed a subscriber: Aklapper.
CommunityTechBot raised the priority of this task from High to Needs Triage.
CommunityTechBot renamed this task from 67aaaaaaaa to Non-rendering of thumbnail of compressed pdf in Commons.
CommunityTechBot added a subscriber: Aklapper.

Is it the same problem with https://commons.wikimedia.org/w/index.php?title=File%3AWilhelm_Gesenius_Hebr%C3%A4ische_Grammatik_(umgearbeitet_von_Emil_Kautzsch).pdf&page=328 ?

I'm pretty sure that the file is a valid PDF because it works on my laptop. It also previewed well at the source site: https://archive.org/details/wilhelmgesenius00gese .