Roku Device Features, Settings & Updates

Help configuring Roku device settings, using Roku OS features such as screen mirroring, adjusting display type and audio settings, using Guest Mode, and assistance with software updates.
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drguz
Level 7

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?

TV model TCL49S405
Roku OS version 9.1.0 build 4129-30
channel "Roku Media Player" version 4.2 build 1655
MP4 media info:
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 704x348 [SAR 10:11 DAR 160:87], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
    Stream #0:2: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
MKV media info:
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 704x348 [SAR 10:11 DAR 160:87], q=2-31, 963 kb/s, 23.98 fps, 23.98 tbr, 1k tbn, 24k tbc (default)

    Stream #0:1(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Stream #0:2(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 44100 Hz, stereo, fltp, 128 kb/s

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renojim
Level 8

Re: Encoding multiple audio tracks for Roku Media Player

It's a limitation of the firmware. I don't know if MKV is the only container that supports on the fly audio track selection, but MP4 does not.

-JT
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