Encoding multiple audio tracks for Roku Media Player
I've got a video file with multiple audio tracks. When playing from a USB thumb drive, my Roku TV lets me choose which track to hear with the "star" menu, but only if the file is MKV format. For MP4 files, the "Audio track" menu item is grayed out, even though I've verified the tracks are present and playable using MPC-HC on Windows.
I'm comfortable using ffmpeg to transcode, so it's not a big deal for me to simply use MKV ... but I'm curious if there's a step I'm missing to get Roku Media Player to recognize the secondary audio in MP4? Or is this a limitation of RMP?