CLI movie creating from JPEG's and CAF's

On a CentOS 8 environment (Media Temple VPS) I need to create a movie from a set of JPEG images and CAF audio files. The images are numbered so they just need to bu "glued" into a movie at 5 FPS (all images are the same, fixed size and their total number is known). CAF files need to be inserted into the movie at a certain location, ie first sound file at 2sec, second at 7.4sec. The finished movie needs to go on YouTube so all used codecs have to be OK with YouTube. Your job is to install all the needed scripts on the VPS - you'll have root access. And provide a couple of example uses of the script ie. for ffmpeg it would be "ffmpeg -r 5 -i test-%[login to view URL] test.avi". ffmpeg is already installed on the server and creates movies from JPEG's without a problem. Putting sound on the movies does not work. The sounds do not have to be glued on the movie in one pass. Each command can put one sound file on the movie. Example CAF file is attached.