流媒体

Multi tool use
流媒体(streaming media)是指將一連串的媒體資料壓縮後,經過網路分段傳送資料,在網路上即時傳輸影音以供觀賞的一種技術與過程,此技术使得資料封包得以像流水一样发送;如果不使用此技术,就必须在使用前下载整个媒体文件。
流媒体文件一般定义在bit階層,因此串流封包并不一定必须按照字节对齐,虽然通常的媒体文件都是按照这种字节对齐的方式打包的。流媒体的三大操作平台是微软公司、RealNetworks、苹果公司提供的。
影音串流
「影音串流」(video streaming)為即時播放下載影像的服務,“手機看電視”為影音串流服務之一。串流傳輸可傳送現場影音或預存於伺服器上的影片,當觀看者在收看這些影音檔時,影音資料在送達觀賞者的電腦後立即由特定播放軟體播放(如Windows Media Player,Real Player,或QuickTime Player,音樂方面有KKBOX或Spotify等),現行的有些影音直接使用瀏覽器就可以播放。4G高速移動寬頻流行後,手機等移动線上串流也大發利市,是作為直播等社群經濟發展土壤的重要技術。此外,電視與音樂等傳統媒體也逐漸流行改以串流服務的形式,閱聽人不必單向收視或購入專輯,可以直接連接網路資料庫的龐大庫存。
而系統商內容提供業者製作“手機看電視”影片(3GP)工具有二:
- Helix Mobile Producer
- Apple Quicktime Pro
参考文献
參見
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