Media Framework Support on OsX Is Very Limited

Hi! In 4.7 final release I can confirm support for seeking on MP4 and WMV files under Windows (not under OsX, but I will survive), but I cannot hear any sound when playing the video from the UE4 Media Player and/or when I apply the media texture/material anywhere in the scene, even if the correct audio track is selected. Is it supposed to work so? Or I have to explicitly import the audio track and manage it separately? Is it a question of audio format support in the video? If so, could you advice a working audio format to use in MP4/M4V/WMV files? Thanks for your support and excellent work, Bab.