Legacy ImageMagick Discussions Archive

Occasionally in the past I've had thumbnails for pdf files for which the background has turned to black. I resorted to manually generating the thumbnails until the " -background White -layers flatten" fix sorted this but a recent file has given me ALL the pages flattened into the one image. Obviously all I'm trying to get is the first page with a white background as a thumbnail when uploading a pdf. I can bodge things and upload a single page pdf before manually copying over the full document, but there must be an easier way ... or is there some way to tidy the pdf itself instead?

To get just the first page, append "[0]" to the pdf name, eg:

I've worked out how to add that to the source file string but it's not making any difference. the library code is using convert '$source' '$thumb' and I've added the ; -background White -layers flatten ' between the file strings, and I have [0] inside the '' wrapper for the source file ? This is the problem trying to fix other peoples code But can you point me to a manual page which shows the [0] option?

On [0] etc, see https://imagemagick.org/Usage/files/#read_mods

Turns out the problem is with the version of ghostscript running on suse Leap 15.0 ... 9.26a is supposed to fix the page select fault but I had to update to the 9.27 to avoid it and now things are working. Need to update 2 more servers as well now

GS 9.27 is also reported to have some issue. I would suggest downgrading to 9.23, 9.24, or 9.25