mp4tools question regarding 2 5.1 ac3 tracks

Discussion in 'Apple TV and Home Theater' started by DaGrandMastah, Jan 14, 2013.

  1. DaGrandMastah macrumors 6502a

    Mar 19, 2011
    I'm trying to convert an old school kung fu movie with 2 ac3 audio tracks. Would I need to create 2 seperate aac tracks to ensure that they play on any tv?

    I know with 5.1 ac3 you need a 2 channel aac for it to play on any tv.

    Also, in subler, would I just select one of the aac tracks as the default? Will there be any issues with playing audio with that many tracks or do I just need to change the alternate group on them?
  2. mic j macrumors 68030

    Mar 15, 2012
    Only need 1 AAC track set to default.
  3. DaGrandMastah thread starter macrumors 6502a

    Mar 19, 2011
    But I need to create both language tracks as aac in order to ensure htey both play the ac3 when the connection is available?
  4. mic j macrumors 68030

    Mar 15, 2012
    I have never encountered your exact situation. I only do one language, english. But if you are playing only on an aTV and you are wanting to listen to either of the 2 AC3 tracks, I see no reason why you would need to have 2 AAC tracks.

    Now, if you are wanting to watch (or ever think you might want to watch) the movie on something that is stereo (iPad, TV speakers, etc), then you would need an AAC track for each language.

    You easiest solution is to transcode a single chapter in the format (single AAC or double AAC) and see if it works in your particular situation. Just transcoding a single chapter will be a pretty quick test to find out.

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