I would like to convert a .png into a .pdf (I guess it's actually being embedded) whilst reducing the filesize. So I thought, jpeg-compression might be a good choice. So far it works well with ImageMagick using 2 commands: Converting it into a .jpg first and then converting it into a .pdf.
convert image.png -quality 92 image.jpg
convert image.jpg image.pdf
Now, is there a way to do that in only one command?
In ImageMagick, try
convert image.png -compress JPEG -quality 92 image.pdf