Let me explain my requirement. I am creating a "UNIQUE" way for Storing workshop or seminar content. In a proposed architecture , I am splitting content in separate streams. So Audio, Video, Slides, All will go in separate stream. So I am writing a program which will record videos , audio and play slides. Now when everything go in separate streams then how I will be able to synchronize all the streams ? so basically I am looking for a way to put some meta data in stream or outside the stream which can be used to synchronize all the streams. and how gst can help. may be you can direct me to more suitable mailing list where I can ask such question. -- ┌─────────────────────────┐ │ Narendra Sisodiya │ <a href="http://narendrasisodiya.com">http://narendrasisodiya.com</a> └─────────────────────────┘