Change framerate of mp4 video without reencoding using mp4box and piping

Question

I'd basically like to do what this guy asked for. Using the lines of Mitch I get a perfect result. I'd now love to use the output of mp4box directly as input of mp4box again (to make one command out of these two lines) and came across pipes and redirectors. Is there any possibility of getting the functionality of those two commands into just one by using pipes or something similair?

Answer 1

Unless you can convince mp4box to both read the input video file from STDIN; and write the output video file to STDOUT or use some user-specified file descriptor (see mp4box's documentation), pipes do not apply. However, you could put both of those commands (or similar) into a shell script, and issue the two commands by typing the shell script's name.