add ffmpeg initializer (#8855)

* add ffmpeg initializer * use different expression to check for environment var

add ffmpeg initializer (#8855)
b2a57a5d · Sascha · Eugen Rochko · 87abbb07 · b2a57a5d
--- a/config/initializers/ffmpeg.rb
+++ b/config/initializers/ffmpeg.rb
+if ENV['FFMPEG_BINARY'].present?
+    FFMPEG.ffmpeg_binary = ENV['FFMPEG_BINARY']
+end