nwjs-ffmpeg install problems

ls -lhd /opt/nwjs/*
-rw-r--r-- 1 root root 2.1M Apr 18 01:23 /opt/nwjs/credits.html
-rw-r--r-- 1 root root 9.9M Apr 18 01:23 /opt/nwjs/icudtl.dat
drwxr-xr-x 2 root root 4.0K Apr 18 01:27 /opt/nwjs/lib
-rwxr-xr-x 1 root root 2.5M Apr 24 18:18 /opt/nwjs/libffmpeg.so
drwxr-xr-x 2 root root 4.0K Apr 18 01:27 /opt/nwjs/locales
-rw-r--r-- 1 root root  82K Apr 18 01:23 /opt/nwjs/natives_blob.bin
-rwxr-xr-x 1 root root  48K Apr 18 01:23 /opt/nwjs/nw
-rw-r--r-- 1 root root 966K Apr 18 01:23 /opt/nwjs/nw_100_percent.pak
-rw-r--r-- 1 root root 1.3M Apr 18 01:23 /opt/nwjs/nw_200_percent.pak
-rw-r--r-- 1 root root 4.7M Apr 18 01:23 /opt/nwjs/resources.pak
drwxr-xr-x 2 root root 4.0K Apr 18 01:27 /opt/nwjs/swiftshader
-rw-r--r-- 1 root root 673K Apr 18 01:23 /opt/nwjs/v8_context_snapshot.bin

ls -lhd /opt/nwjs/lib/*
-rwxr-xr-x 1 root root 1.9M Apr 18 01:23 /opt/nwjs/lib/libffmpeg.so
-rwxr-xr-x 1 root root  25M Apr 18 01:23 /opt/nwjs/lib/libnode.so
-rwxr-xr-x 1 root root 131M Apr 18 01:23 /opt/nwjs/lib/libnw.so

diff /opt/nwjs/libffmpeg.so /opt/nwjs/lib/libffmpeg.so
Binary files /opt/nwjs/libffmpeg.so and /opt/nwjs/lib/libffmpeg.so differ