Legacy ImageMagick Discussions Archive

Use the following command to generate EPPS thumbnail and notice the thumbnails are blurry

convert -define jpeg:size=319x319 <path to EPS file> -thumbnail 319x319 cq5dam.thumbnail.319.319.png

There is no -define jpeg:size. There is a -define jpeg:extent={size} where size is in kb. See https://imagemagick.org/Usage/formats/#jpg_write. Also add -density XX before reading the pdf to get better quality.
Fill in your desired outfile file size in kb