HandBrake Audio Settings

Discussion in 'Apple TV and Home Theater' started by GarrettL1979, Mar 4, 2013.

  1. GarrettL1979 macrumors 6502

    Joined:
    Feb 15, 2012
    #1
    I am converting a blu ray to m4v that does not contain an HD audio track. Instead, it has a DD 5.1 and PCM track. Which option would be the better source to go with within the ATV 3 preset's audio settings in HB?
     
  2. dynaflash macrumors 68020

    Joined:
    Mar 27, 2003
    #2
    Probably the DD 5.1 track presuming it is ac3.
     
  3. GarrettL1979 thread starter macrumors 6502

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    Feb 15, 2012
    #3
    Thanks! What is PCM?
     
  4. dynaflash macrumors 68020

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    Mar 27, 2003
    #4
    Pulse code modulation
     
  5. GarrettL1979 thread starter macrumors 6502

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    Feb 15, 2012
    #5
    Thanks. I did a little research, and it sounds like PCM would be the highest quality track considering it's uncompressed. Shouldn't I select the highest quality source within the ATV 3 preset? Like DTS-HD, TrueHD, PCM... or does this even matter since the ATV will only play back DD?
     
  6. blanka macrumors 68000

    Joined:
    Jul 30, 2012
    #6
    Since when does Handbrake do Blu-Rays? Curious about that one.
    With DVD's I always put on pass-through under Audio. It leaves the audio stream as is, and they are not the biggest part anyway.

    PCM in theory is better, but remember, with Blu-Ray, only digital-out delivers the highest quality (Dolby TrueHD and DTS-HD MA). If you set it to output PCM, it will only be 48khz/16bit, where the HD tracks can contain 192khz/24 bit channels.
     
  7. dynaflash macrumors 68020

    Joined:
    Mar 27, 2003
    #7
    Right, I would rather pass thru the AC3 then encode the pcm to AC3 or aac.
    HB can read and encode a blu ray but cannot decrypt it.
     
  8. Alameda macrumors 6502a

    Alameda

    Joined:
    Jun 22, 2012
    #8
    That's right. Dolby Digital, DTS-HD and TrueHD decompress into PCM audio.

    Some discs have PCM stereo tracks; they use these for foreign languages or commentary tracks. Other titles have very high-quality PCM 7.1-channel tracks. So... sometimes PCM is better (when it's 5.1 or 7.1) and sometimes it's worse (when it's stereo).
     

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