A Study of Video-Audio Streaming Technology and an Implementation of Integrated Management System

[[abstract]]影音串流技術(Video and Audio Streaming)隨著通訊網路而蓬勃發展，其發展的目的在於如何透過通訊網路即時傳送多媒體的視訊與音訊資料，而用戶端不需要等待檔案下載完畢，即能立即播放，節省用戶端冗長的等待時間及龐大的暫存空間。為了方便管理者在遠端進行影音串流服務的運作與管理，本論文研究與實作了一個影音串流技術服務的整合管理系統，此系統分成三大部份：製作影片處理端、伺服器遠端管理端、播放測試端。使用製作影片處理端做擷取原始影音，接著透過視訊壓縮成為MPEG-4的影音格式並使其支援串流播放，並可以遠端上傳到伺服器的儲存媒體中，接著透過伺服器遠端管理端來進行串流伺服器的設定與管理，並也提出了串流影片遠端權限存取控管機制，讓有權限的使用者享受更良好的串流品質。最後，播放測試端方便管理者測試整個串流服務設定是否能正常播出開放的影片。因此論文實作的整合管理系統，不但方便管理者進行遠端串流服務的整個運作，更透過遠端權限存取控管確保影片的欣賞品質。本論文也為了更瞭解串流服務的整體運作，以MPlayer客戶端播放器之原始碼為例，更進一步的研究用戶端如何做串流影片要求、傳送到呈現影像，透過探討與分析原始碼與擷取網路封包來驗證影音串流傳輸時的程序，包含研究以MPlayer客戶端播放端如何使用RTSP（Real Time Streaming Protocol）協定向伺服器端要求影音資料的過程，以及播放端如何接收與解析伺服器傳送過來的RTP（Real-time Transport Protocol）影片資料、傳送RTP過程中如何使用RTCP（Real-time Transport Control Protocol）做控制的過程，最後介紹Mplayer播放程式如何對收到的MPEG-4的影音做解碼與呈現影片，做一個完整的研究與驗證。[[abstract]]An audiovisual streaming technology is becoming even more important recently with the widespread use of Internet. It conveys video and audio streams in real time through Internet. A client player can play an audiovisual stream that transmitted from server. In addition, it doesn’t have to wait until the downloaded streams are completed. The advantages of this technology are to save the waiting time and reduce the disk storage. In order to make it convenient, the administrator can operate and manage the Video-Audio Streaming service in remote. So, the thesis is an implementation about an integrated management system of Video-Audio streaming service. This system integrates three major components, the process of the video and audio, server management, and Video-Audio test player. Using the Integrated Management System can control WebCam to catch video and audio. And, compressing it into MPEG-4 format, then upload and store the content to the streaming server. The content can be outputted by streaming technology via the streaming server. Not only can it operate and manage the Video-Audio streaming server by means of the remote Management system, but the authentication and authorization access control functions provide users the better video quality. Finally, using the test player can check all the settings of streaming service correctly. Besides implementing an integrated management system of Video-Audio streaming service, this thesis studys the streaming network packet, the processes of Video-Audio streaming service that contain the protocol of RTSP, RTP, RTCP , and decoding the MPEG-4 video by MPlayer