请教13大，一个PS3播放的问题

topmantom

下载了一条720P的片子，分辨率是1280*528，用tsMuxer GUI封装成AVCHD，移动硬盘播放。但在PS3播放的时候，按▲菜单，看到片子的分辨率降低变成了720*480，但我看移动硬盘里面的00001.M2TS文件，分辨率还是1280*528啊。

这是为什么呢？.

topmantom

--------------------------------------------------------------------------------
　　Kick-Ass(2010)
--------------------------------------------------------------------------------
[RELEASE INFORMATION]
RELEASE.NAME...: Kick-Ass.2010.Blu-ray.Re.x264.720p.DTS-HDS
RELEASE.TIME...: UTC 2010-07-30 02:31:00
IMDB.LINK......: http://www.***.com/title/tt1250777/
IMDB.RATING....:
Genre..........:
RUN.TIME.......: 1h 57mn 44s 891ms
SIZE...........: 5.79 GiB
CONTAINER......: Matroska
VIDEO.CODEC....: AVC High@L4.1
FRAME.RATE.....: 23.976 fps
BIT.RATE.......: 5540 Kbps
RESOLUTION.....: 1280 x 528
ASPECT.RATIO...: 2.424 : 1
AUDIO..........: English DTS 1536 Kbps 48.0 KHz 24 bits,6 channels 3/2.1
RIP.SOURCE.....: Blu-ray
RIPPER.........: HDStar

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ps3会把高度小于584的降格为480p播放