Apple TV4 latest firmware
VLC latest version
B&W Z2 Airplay wireless speaker
All other apps play audio OK through AirPlay (Netflix, HBO Go, DirectTV Now etc etc etc).
VLC playing an H264 video file with stereo AAC audio hosted on a DLNA media server hard drive: audio plays OK through HDMI, OK through Bluetooth to AirPods; but NO AUDIO through AirPlay. I hear a few short bursts of audio (<1second) intermittently in the Airplay speaker, but unusable. Duplicates on every other video file that I've tried with VLC. Not sure what to do to debug this.