在基于视频内容的多媒体查询与检索系统中,经常希望用静态图像来表示视频内容,在视频点播中,有时需要视频服务器提供一种快进、快退的功能。提供了一种提取I帧的方法,并对PCR,DTS,PTS时间信息进行了讨论-Video content-based multimedia query and retrieval system, often wish to use static images to said video content in video-on-demand, the video server is sometimes necessary to provide a fast-forward, rewind functions. Provides a method of extraction of I-fr a me, and PCR, DTS, PTS time information discussed