This change adds mp4 support confirmed on Heroku-16 stack.
@ -0,0 +1 @@
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/app/.apt/lib/x86_64-linux-gnu:/app/.apt/usr/lib/x86_64-linux-gnu/mesa:/app/.apt/usr/lib/x86_64-linux-gnu/pulseaudio
@ -1,2 +1,5 @@
protobuf-compiler
libprotobuf-dev
ffmpeg
libxdamage1
libxfixes3