I use Air Video on iPhone, iPad, and AppleTV 4. On the AppleTV I'm regularly annoyed by the fact that my m4v files invariably default to Stereo and have to be manually changed to AC3 for every file played. While I understand this default for the iPad, its clearly annoying to the AppleTV 4 which is commonly hooked up to an AV receiver. Other playback apps like infuse seem to figure it out and just default to the AC3.
Am I missing something? These streams are mostly things I've encoded in handbrake. As I said, things like Plex and infuse on he ATV figure it out but the same file in Air Video defaults to stereo.
I much prefer Air Video for its quickness and reliability at just getting to the file and playing it without all the eye candy of the others but having the check the audio stream all the time is an annoyance.