说明：  ：GStreamer是一个开源的多媒体框架库。利用它，可以构建一系列的媒体处理模块，包括从简单的ogg播放功能到复杂的音频（混音）和视频（非线性编辑）的处理。 应用程序可以透明的利用解码和过滤技术。开发者可以使用简洁通用的接口来编写一个简单的插件来添加新的解码器或滤镜.这本书是gstreamer的英文手册，供初学者使用。
(: GStreamer multimedia framework is an open source library. Use it, you can build a range of media processing modules, including the ogg playback from simple to complex audio (mixing) and video (non-linear editing) processing. Applications can transparently use of decoding and filtering technology. Developers can use simple generic interface to write a simple plug-in to add a new codec or filter. Gstreamer This book is the English manual for beginners.)