因为反感realplayer老是自动加重readsch之类的进程，又听说media player classic已经支持几乎所有的视频格式了，于是把realplayer彻底卸载了

不料刚才一试rm，就无法播放了！

Stream 0

Media Type 0:
--------------------------
AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: Unknown GUID Name {4B4F4F43-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 1
lSampleSize: 13344
cbFormat: 104

WAVEFORMATEX:
wFormatTag: 0x2004
nChannels: 2
nSamplesPerSec: 44100
nAvgBytesPerSec: 0
nBlockAlign: 834
wBitsPerSample: 16