Max bit rate for apple tv

Discussion in 'Apple TV and Home Theater' started by santangelo, Jan 2, 2010.

  1. santangelo macrumors regular

    Joined:
    Apr 15, 2006
    #1
    Hi

    in Quicktime's movie inspector here is the spec of a film can you please tell me why this plays in itunes an not on the apple tv

    Format: H.264, 1280 x 544, Millions
    AAC, 5.1 (C L R Ls Rs LFE), 48.000 kHz

    FPS: 23.98

    SIZE: 1280 x 544 pixels

    Thanks
     
  2. xfiring macrumors member

    Joined:
    Oct 10, 2009
    #2
    You need to look at the bitrate. I've had files play as high as 7500 kbps, but to be safe total bit rate needs to be around 5000 kbps.
     
  3. seepel macrumors 6502

    seepel

    Joined:
    Dec 22, 2009
    #3
    There are different flavors of H.264 enoding (Profiles) Apple TV will only play Main or lower I believe. It is quite common to find movies in High profile though. Perhaps this is the problem?

    For more information see here
    http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC
     
  4. paol macrumors member

    Joined:
    Jun 7, 2008
    Location:
    Sweden
    #4
    You can use Mediainfo to check the profile of the encode. ATV has the horsepower to play Main@3.1 and in some cases High@3.1 but it needs to be the "right" high profile settings.

    Most downloads in mkv format are High@4.1 which can't be played or synced to ATV. iTunes and QT will play without difficulty if the computer is fast enough.

    The ATV can actually handle quite high bitrates if the encoding is not to "tough".
     

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