视频文件信息：
General
Format : RMF
File size : 405 MiB
PlayTime : 1h 13mn
Bit rate : 753 Kbps
Video #1
Codec : RealVideo 4
Codec/Info : H264, RealVideo 9
PlayTime : 1h 13mn
Bit rate : 657 Kbps
Width : 512 pixels
Height : 384 pixels
Aspect ratio : 4/3
Frame rate : 25 fps
Resolution : 12 bits
Bits/(Pixel*Frame) : 0.134
Audio #0
Codec : Cooker
Codec/Info : Real Audio G2/7 Cook (low bitrate)
PlayTime : 1h 13mn
Bit rate : 96 Kbps
Channel(s) : 2 channels
Resolution : 16 bits
SampleRate : 44100
