I have a generic Android set top box. It works fine mostly, except it won't play audio for .avi, .mkv, mp4, etc. files. I can successfully hear audio on movies via NetFlix and YouTube, but if I download a movie, there's no audio.
I have tried multiple media players, including MX Player and VLC but neither works.
I haven't knowingly changed something to cause this. Any ideas what it could be?