＊QT7.2（07/07/上旬）が対応したとの情報有り。
http://aflux.deltaanime.net/Zero1/MP4/x264.html#analysis
--8x8dctAdaptive spatial transform size. This will allow the encoder to choose from 8x8 dct in addition to 4x4dct. This must be enabled to use the i8x8 macroblock type as mentioned in --analyse. Note: Using this feature makes the stream fall into the High Profile category, so make sure decoders and player support High Profile, or at least this feature.
