No audio from MP4 video file on ATV. Why?

Discussion in 'Apple TV and Home Theater' started by institute, Sep 20, 2013.

  1. institute macrumors regular

    Oct 10, 2012
    I have an MP4 video file, that on the ATV the video plays but there is no audio. This is the case whether I play it via Home Sharing or through Plexconnect. If I force transcoding via the Plexconnect settings, the audio does play. My question: Does anyone know why this is the case and is there anyway to get the audio to play without forcing transcoding?

    Here is what I know about the audio stream in the file:

    The maker says Audio 1: English | 128 Kbps | 2ch | AAC

    According to VLC media information:

    Codec: MPEG AAC Audio (mp4a)
    Channels: Stereo
    Sample Rate: 48000 Hz

    This is the video info:

    Codec: H264—MPEG—4 AVC (part10) (avc1)
    Resolution: 1920 X 794
    Frame rate: 23.976

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