How to calculate the total size of certain files only, recursive, in linux

Question

I\'ve got a bunch of files scattered across folders in a layout, e.g.:

dir1/somefile.gif
dir1/another.mp4
dir2/video/filename.mp4
dir2/some.file
dir2/blahbla         


        

Answer 1

This will sum all mp4 files size in bytes:

find ./ -name "*.mp4" -printf "%s\n" | paste -sd+ | bc