[wp-trac] [WordPress Trac] #64593: allow PDF preview generation without sizes

[WordPress Trac]

#64593: allow PDF preview generation without sizes
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 Reporter:  aryanrajseo              |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  Awaiting Review
Component:  Media                    |     Version:  6.9.1
 Severity:  normal                   |  Resolution:
 Keywords:  2nd-opinion needs-patch  |     Focuses:  administration
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Comment (by Presskopp):

 I agree that the missing PDF previews are a real issue and should be
 addressed. However, this ticket also highlights a more general question
 about how WordPress decides whether media previews and other derived files
 should be created.

 At the moment, setting image sizes to 0 is commonly used to effectively
 turn off thumbnail generation. This behavior is widely relied upon, but it
 is not clearly defined and ends up influencing things that users would not
 necessarily expect, such as PDF previews.

 From a user and product perspective, image dimensions describe the size of
 images, not whether previews or other media representations should exist
 at all. Still, changing the behavior of 0 is not an option, as many sites
 depend on it today.

 Instead of fixing PDF previews in isolation, it may be worth discussing a
 more general and explicit way to decide when derived media files should be
 created, while keeping the current behavior for existing sites fully
 intact.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64593#comment:2>
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