Many (most? all?) MPEG video files on commons seem to lack proper thumbnail images. This results in weird-looking results and a black preview image on the MediaSearch page. But the problem is also noticeable on the underlying File pages for the videos in question.
It seems like something is preventing proper thumbnail generation for these files.
Steps to Reproduce
- Go to Special:MediaSearch on Commons, and search for videos with the file type "mpeg" filter active. Here's an example search (https://commons.wikimedia.org/wiki/Special:MediaSearch?type=video&q=march&mimeType=mpeg)
- The grid will not display the previews
Note: The file page also doesn't display the previews for mpg format (and the thumbnail is also not displayed):
The solution for Special:MediaSearch could be to display a nicer placeholder?
Seems to be related to this issue: https://phabricator.wikimedia.org/T244570