It maybe useful for you, in any case I skipped the documentation because I was seeing the following error:
HTML doc/ffmpeg.html
makeinfo: error parsing ./doc/t2h.pm: Undefined subroutine &Texinfo::Config::set_from_init_file called at ./doc/t2h.pm line 24.
make: *** [doc/Makefile:70: doc/ffmpeg.html] Error 1
It maybe useful for you, in any case I skipped the documentation because I was seeing the following error: