Video: Where Streaming Latency is Today

了解更多关于延迟的信息流媒体的下一个事件.

Watch the complete video of this panel from 流媒体西部, DT103. The Road to Scalable, Real-Time 在线直播，在… 流媒体 Conference Video Portal.

Read the complete transcript of this clip:

蒂姆·多尔蒂: Do you remember "Click here to download Real Player?" "Click here to download Windows Media Player?" I did my first stream in 1999--yes I know, that's awesome.

Real server, there's Flash, QuickTime. Those are some of the old protocols, but are super-fast. RTSP, 例如, I believe that's what Real was using at the time, and there are people who are building mobile applications to scale using RTSP because it is low latency. It doesn't have a lot of bells and whistles on it, but some of these old legacy video streaming protocols actually are quite remarkably fast.

Today, of course, there are the HTTP streaming protocols. That's the old Apple logo, by the way, which I think is pretty cool.

这是Adobe, 圣何塞流媒体, 微软流畅流, which was another phenomenal protocol, and then of course there's MPEG DASH. 这给你8-10秒. 这就是我们一直在做的事情.

我们今天在哪里?? Out of the box, you get a 10-second chunk. I just kind of tried to describe a couple minutes ago how, 当你看视频的时候, 你在看10秒钟, and then your player's downloading the next 10 seconds and then it gets into that second chunk, and then the next chunk arrives and that's functionally how it works.

我们可以改变这一点. You get into a media server and you can say, “不要做一个10秒的分段, do a half-second chunk or a one-second chunk.”

Then the media server gets super-busy, 网络变得超级繁忙, but you end up with better latency. You end up with 8-10 seconds instead of 30-45 seconds.

You might remember from earlier how I shake down people who think they want low latency. Sometimes tuned, optimized, super HLS--whatever you want to call it--sometimes that's plenty good. 再一次。, if you can get by and you don't need that ultra-right-now, 超低延迟, 修改后的HTTP非常棒.