Why AppleTV is not playing 1280x720 at 30fps?

Why AppleTV is not playing 1280x720 at 30fps? I tested and is playing 1280x720 at 25 fps, therefore I think is just a software restriction not a hardware capability. Converting from 1080i to 960x540 I'm loosing quality, and if I convert from 29.97 to 24 fps, the transitions are not smooth.

It's outside AppleTV playback specs which is officially a maximum of 720p 24fps, though many have observed that 25fps works.
AppleTV does not have very high performance components so it may well be hardware limitation.
It's a shame it flatly refuses to play - but I guess it's Apple's way pf preventing complaints that 720p video is very stuttery or drops frames.
Good for us in UK/PAL land where our camcorders will default to 25fps as we can usually get downconverted 25fps 720p to play, but seems odd given Apple is a US company that they did not ensure 720p would play at least at NTSC frame rates.
Trouble is the device's video is clearly aimed at iTunes Store video playback, and commercial movies are usually 24fps so 720p 24fps is fine for that purpose.
See specs here:
http://www.apple.com/appletv/specs.html

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         Atom mvhd @ 195643460 of size: 108, ends @ 195643568
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                             Atom avc1 @ 195643862 of size: 124, ends @ 195643986
                                 Atom avcC @ 195643948 of size: 38, ends @ 195643986
                         Atom stts @ 195643986 of size: 403840, ends @ 196047826
                         Atom stss @ 196047826 of size: 8476, ends @ 196056302
                         Atom stsc @ 196056302 of size: 28, ends @ 196056330
                         Atom stsz @ 196056330 of size: 253724, ends @ 196310054
                         Atom stco @ 196310054 of size: 8200, ends @ 196318254
         Atom trak @ 196318254 of size: 97713, ends @ 196415967
             Atom tkhd @ 196318262 of size: 92, ends @ 196318354
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                 Atom elst @ 196318362 of size: 40, ends @ 196318402
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                 Atom mdhd @ 196318410 of size: 32, ends @ 196318442
                 Atom hdlr @ 196318442 of size: 33, ends @ 196318475
                 Atom minf @ 196318475 of size: 97492, ends @ 196415967
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                     Atom dinf @ 196318499 of size: 36, ends @ 196318535
                         Atom dref @ 196318507 of size: 28, ends @ 196318535
                     Atom stbl @ 196318535 of size: 97432, ends @ 196415967
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    1    vide  [none listed]              avc1  eng   178711864
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    Atom ftyp @ 0 of size: 28, ends @ 28
    Atom free @ 28 of size: 132, ends @ 160
    Atom mdat @ 160 of size: 100944363, ends @ 100944523
    Atom moov @ 100944523 of size: 1606698, ends @ 102551221
         Atom mvhd @ 100944531 of size: 108, ends @ 100944639
         Atom iods @ 100944639 of size: 24, ends @ 100944663
         Atom trak @ 100944663 of size: 1288497, ends @ 102233160
             Atom tkhd @ 100944671 of size: 92, ends @ 100944763
             Atom mdia @ 100944763 of size: 1288361, ends @ 102233124
                 Atom mdhd @ 100944771 of size: 32, ends @ 100944803
                 Atom hdlr @ 100944803 of size: 33, ends @ 100944836
                 Atom minf @ 100944836 of size: 1288288, ends @ 102233124
                     Atom vmhd @ 100944844 of size: 20, ends @ 100944864
                     Atom dinf @ 100944864 of size: 36, ends @ 100944900
                         Atom dref @ 100944872 of size: 28, ends @ 100944900
                     Atom stbl @ 100944900 of size: 1288224, ends @ 102233124
                         Atom stsd @ 100944908 of size: 186, ends @ 100945094
                             Atom avc1 @ 100944924 of size: 170, ends @ 100945094
                                 Atom avcC @ 100945010 of size: 50, ends @ 100945060
                                 Atom colr @ 100945060 of size: 18, ends @ 10094507 ~
                         Atom stts @ 100945094 of size: 403832, ends @ 101348926
                         Atom stsz @ 101348926 of size: 253724, ends @ 101602650
                         Atom stsc @ 101602650 of size: 24436, ends @ 101627086
                         Atom stco @ 101627086 of size: 56712, ends @ 101683798
                         Atom ctts @ 101683798 of size: 484536, ends @ 102168334
                         Atom stss @ 102168334 of size: 1352, ends @ 102169686
                         Atom sdtp @ 102169686 of size: 63438, ends @ 102233124
             Atom edts @ 102233124 of size: 36, ends @ 102233160
                 Atom elst @ 102233132 of size: 28, ends @ 102233160
         Atom trak @ 102233160 of size: 317950, ends @ 102551110
             Atom tkhd @ 102233168 of size: 92, ends @ 102233260
             Atom mdia @ 102233260 of size: 317828, ends @ 102551088
                 Atom mdhd @ 102233268 of size: 32, ends @ 102233300
                 Atom hdlr @ 102233300 of size: 33, ends @ 102233333
                 Atom minf @ 102233333 of size: 317755, ends @ 102551088
                     Atom smhd @ 102233341 of size: 16, ends @ 102233357
                     Atom dinf @ 102233357 of size: 36, ends @ 102233393
                         Atom dref @ 102233365 of size: 28, ends @ 102233393
                     Atom stbl @ 102233393 of size: 317695, ends @ 102551088
                         Atom stsd @ 102233401 of size: 103, ends @ 102233504
                             Atom mp4a @ 102233417 of size: 87, ends @ 102233504
                                 Atom esds @ 102233453 of size: 51, ends @ 102233504
                         Atom stts @ 102233504 of size: 24, ends @ 102233528
                         Atom stsz @ 102233528 of size: 264600, ends @ 102498128
                         Atom stsc @ 102498128 of size: 28, ends @ 102498156
                         Atom stco @ 102498156 of size: 52932, ends @ 102551088
             Atom udta @ 102551088 of size: 22, ends @ 102551110
                 Atom name @ 102551096 of size: 14, ends @ 102551110
         Atom udta @ 102551110 of size: 111, ends @ 102551221
             Atom meta @ 102551118 of size: 103, ends @ 102551221
                 Atom hdlr @ 102551130 of size: 33, ends @ 102551163
                 Atom ilst @ 102551163 of size: 58, ends @ 102551221
                     Atom ©too @ 102551171 of size: 50, ends @ 102551221
                         Atom data @ 102551179 of size: 42, ends @ 102551221
    Atom free @ 102551221 of size: 132, ends @ 102551353
    ~ denotes an unknown atom
    Total size: 102551353 bytes; 54 atoms total. AtomicParsley version: 0.9.0 (utf8)
    Media data: 100944363 bytes; 1606990 bytes all other atoms (1.567% atom overhead).
    Total free atom space: 264 bytes; 0.000% waste.
    Movie duration: 2116.640 seconds (35:16.64) - 381.53* kbp/sec bitrate (*=approximate)
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    Trk  Type  Handler                    Kind  Lang  Bytes
    1    vide  [none listed]              avc1  und   65533744
         247.74* kbp/s  2116.243 sec  AVC Main Profile,  Level 4  352x240  (330 macroblocks)
    2    soun  [none listed]              mp4a  eng   35410611
         133.84 kbp/s  2116.640 sec  MPEG-4 AAC Low Complexity Profile    channels: [2]

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