老头在公园吃奶小说:请问用压缩成RM格式视频的参数是怎么设置啊？

我用PREMIERE压的，我随便糊弄设定的，结果一个3分多钟的片子有27兆，文件的参数就是下面这样，大家帮忙看看到底问题出在哪里？不影响效果的标准的参数是怎么样的呢？
Stream: RealVideo VBR Stream - Single Rate
File Name: xuejingxiongxin.rmvb
Last Modified: Wed, 15 Mar 2006 07:48:04 GMT
File Size: 111,857,970 Bytes
Title:
Author:
Copyright:
Duration: 03:46.394
Buffer Time: 2.0 seconds
Max Bit Rate: 4999.0 Kbps
Avg Bit Rate: 3924.8 Kbps
Allow Download: on
Allow Recording: on
Perfect Play: disabled

Stream: 0 Audio Stream
MIME type: audio/x-pn-realaudio

Max Stream Bit Rate: 352.8 Kbps

Audio Codec: (Sony ATRAC3) 44100 Khz
Stream: 1 Video Stream
MIME type: video/x-pn-realvideo

Max Stream Bit Rate: 4646.2 Kbps

Avg Stream Bit Rate: 3572.0 Kbps

Dimensions: 520x384

Encoded Frame Rate: 24.0 fps

Video Codec: 3572.0 Kbps (RealVideo 9)
Stream Pairings
0.0 and above
Stream0Bandwidth = 352.8 Kbps

Stream1Bandwidth = 3647.2 Kbps

Player Compatibility: RealPlayer 8.0 or later
谢谢snowpeak
不过"经验用平均500kbps，最高 1000 kbps的VBR"
指的是我这上面的哪个参数啊？