这是一个采用bcb写的vod，经过几次开发， 修正了播放vcd文件时不能切换左右声道 修正了软件加密时的时间计算不正确问题。-This is a used BCB written vod, after several development, amended vcd player file should not switch the left and right to amend the software encryption time when the problem is incor