Run sh file from python

[moi15moi]

I'm trying to build ffms2 by calling autogen.sh from a python script:

import subprocess
subprocess.run("sh autogen.sh", cwd="/msys64/home/moi15moi/ffms2")

I run the python script from a MINGW64 shell.

This is the error I get:

Running autoreconf...
autoreconf-2.72: export WARNINGS=
autoreconf-2.72: Entering directory '.'
autoreconf-2.72: configure.ac: not using Gettext
autoreconf-2.72: running: aclocal --force -I m4
aclocal-1.18: error: aclocal: file '/msys64/usr/share/aclocal/progtest.m4' does not exist
autoreconf-2.72: error: aclocal failed with exit status: 1
Running configure...
autogen.sh: line 7: ./configure: No such file or directory

I don't understand the error because the file /msys64/usr/share/aclocal/progtest.m4 do exist.

PS: These are the package I installed:

• mingw-w64-x86_64-autotools
• mingw-w64-x86_64-ffmpeg
• mingw-w64-x86_64-toolchain