convert every single jpeg to a single pdf, to put every jpeg in a pdf album, like normal jpg2pdf, you can use the option -album
jpg2pdf PRO can automatic detect is the jpeg image is rgb or gray or cmyk and create the correct pdf. Note: jpg2pdf PRO tries to detect if the cmyk image is made by Adobe Photoshop and will use inverted colours to create the pdf (it appears that Adobe Photoshop writes inverted data in CMYK JPEG files: 0 represents 100% ink coverage, rather than 0% ink as you'd expect)
center parameter will center evary jpeg image in the final pdf page
Using image parameter (to set the paper format of the pdf page equal to the image) is possible to use border parameter to set a border around the image
It's possible to set a directory where to put the pdfs (pdfdir) and the jpegs (jpgdir)
It's possible to re-run infinitely jpg2pdf setting the wait seconds