主要发现:Wowza 2019流媒体延迟报告

了解更多关于低延迟视频的信息流媒体东部.

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蒂姆·多尔蒂: Wowza与业内人士取得了联系, 我们的一些客户, 我们做了一个视频流延迟报告. 我们采访了391名播音员. It doesn't look like that many; it's a lot. We asked them a ton of questions, and so we got into some really interesting topics. We realized first off that so much of this is about interactivity, 你可以看到我们在这里把它分解了. Live sports is certainly number one in terms of when latency matters most. 我的意思是, 谁想待在他们的公寓里, 或者观看电视转播的比赛, and they hear people cheering down the hall who may have been watching it on a lower-latency service? Or maybe you're watching it on Twitter and the people on broadcast are hearing at first. 没人想这样. 他们想先听.

的电子竞技. I could easily segue on to 的电子竞技, because I went to TwitchCon. I shouldn't have gone to TwitchCon, but I learned a lot. 我会继续. 视频和音频聊天，赌博. Gambling is really a fascinating part of the streaming business. 其中很多——如果不是全部的话——发生在海外. 拍卖、互动应用、OTT.

You can see that there's some pretty important verticals for low latency and interactive use cases, but the one I'm driving toward is the gray bar on the bottom, 也就是“其他”.“这就是有趣的地方, because you can kind of get in touch with some of these use cases. This is where people who are starting video companies are creating applications. 他们想要那种互动性. I'm working with a company right now that does live meditation, 哪一个用例比较独特, 但他们需要这种互动性. 医疗保健. I'm working with another case right now where a company is actually learning how to monitor premature babies that are in a clinic in areas of the world where there aren't doctors. 他们需要立刻知道 ... 如果孩子动了，他们得马上看到.

我觉得婚礼很有趣. 婚礼真的需要低延迟吗? 我想有些人会. 监测, obviously drones--I sure hope we have low latency with drones, especially those who do it for EMS and surveillance and such, 因为你必须知道你在做什么. So as you can see there's just several kinds of cool niche areas where you can apply low latency.

低延迟最重要的因素是什么? 首先，他们想要高质量的视频. 你不能为了低延迟而牺牲质量. You can't say, "Well, it's pixelated, but it's really fast." Viewers don't appreciate high-quality video--they expect it.

扩展能力. 很明显. If you're scaling using a propriety protocol like Wowza Streaming Engine, 例如, 而且你没有使用CDN, you're going to have to buy a whole lot of instances of software, 这非常昂贵. That's a good way to go; we're happy to sell you the software. 但它需要能够规模化. 低端到端延迟. 我们已经讲过了. 实时交互性.

他们现在是怎么做的? 大多数人都是通过欺骗来实现的. I like to call it "cheating," but I say that objectively. Watching those quick one-second segments, that's how most people are doing it today. 还有实时协议. 人们仍然在使用RTMP. 人们仍在使用我们的RTSP，速度超快. 它不是基于块的. 它只是简单的老式流媒体. I talked to a guy today who used to work for RealNetworks. 有人记得吗?? 下载RealPlayer. 同样的技术仍然存在. 我为此感到自豪.

也有专有的解决方案. Videon有一个使用Amazon S3的非常酷的手机. 我一直没时间去看一看. Wowza使用一种名为WebSockets的专有解决方案. 我们可以在浏览器中快速传送视频. 外面有那么几个人，

他们计划如何在未来减少碳排放? 12% of the people are still going to do that short segment duration, which is a viable option. 人们仍然会使用他们的RTMP. 祝你在2020年使用RTMP时好运. 也许你可以把电脑上的日期倒回去. 我不知道. 也许有办法骗过它. 但是RTMP是Flash. 它需要Flash插件, 以及主要的浏览器平台, 尤其是铬, 都在说“没有闪电侠了?." HTTP low-latency--which is essentially the low-latency HLS--is something I haven't even mentioned until this very moment. Apple has taken and released a spec that can take that chunk, 那10秒钟, 然后把它分成小段.

我们正在为此努力. I think we're going to be one of the first people to get it to market on a streaming server. That's where the player can actually get little tiny segments of a chunk. 这是一项迷人的技术. It's very new, and I believe that's where this is all going to end up. When low-latency HLS matures, we're going to all be using it. We ought to, because it's universal--it plays on the devices, it plays in the browser. We don't have it playing in the browser quite yet, but we're getting there. And then there are also still going to be the very valid, very useful proprietary solutions.