Image Magick
img to pdf
convert img.jpg img2.jpg book.pdf
memory issues
Error:
convert-im6.q16: cache resources exhausted `20200731_110704.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110758.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110806.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110815.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110822.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110832.jpg' @ error/cache.c/OpenPixelCache/4080. convert-im6.q16: cache resources exhausted `20200731_110839.jpg' @ error/cache.c/OpenPixelCache/4080.
Increase memory /etc/ImageMagick-6/policy.xml