There are few people who should build their own CDN, contends Steve Miller-Jones from Limelight Networks. If you want to send a parcel, you use a parcel delivery service. So if you want to stream video, use a content delivery network tuned for video. This video looks at the benefits of using CDNs.
John Porterfield welcomes Steve to YouTube channel JP’sChalkTalks and starting with a basic outline of CDNs. Steve explains that the aim of the CDN is to re-deliver the same content as many times as possible by itself without having to go back to a central store, or even back to the publisher to get the video chunk that’s been requested. If your player is a few seconds behind someone else’s who lives in the same geography, then the CDN should be able to deliver you those same chunks almost instantly from somewhere geographically close to you.
Steve explains that in the Limelight State of Online Video 2020 Annual Report rebuffering remains the main frustration with streaming services and, remaining at approx 44% for the last 3 years when taken as a global average. Contrary to popular belief, the older generation is more tolerant of rebuffering than younger viewers.
As well as maintaining a steady feed, low-latency is remaining important. Limelight is able to deliver CMAF down to around a 3-second latency or WebRTC with sub-second latency. To go along with this sub-second video streaming, Limelight also offer sub-second data sharing between players which Steve explains is a important feature allowing services to develop interactivity, quizzes, community engagement and many other business cases.
Lastly Steve outlines the importance of Edge computing as a future growth area for CDNs. The first iteration of cloud computing was a success by taking computing into central locations and away from individual businesses. This worked well for many for financial reasons, because it freed organisations up from managing some aspects of their own infrastructure and enabled scaling of services. However, the logic of what happened next was always done in this one central place. If you’re in Australia and the cloud location is in the EU, then that’s a long wait until you get the result of the decision that needs to be made. Edge computing allows small parts of logic to live in the closest part of a CDN to you. This could well mean that the majority of a service’s infrastructure is in the US, but some of the CDN be it CloudFront, Limelight or another will be in Australia itself meaning pushing as much of your services as you can to the edge will result in significant improvements in speed/latency reduction.
There are two main modern approaches to low-latency live streaming, one is CMAF which used fragmented MP4s to allow frame by frame delivery of chunks of data. Similar to HLS, this is becoming a common ‘next step’ for companies already using HLS. Keeping the chunk size down reduces latency, but it remains doubtful if sub-second streaming is practical in real world situations.
Steve Miller Jones from Limelight explains the WebRTC solution to this problem. Being a protocol which is streamed from the source to the destination, this is capable of sub-second latency, too, and seems a better fit. Limelight differentiate themselves on offering a scalable WebRTC streaming service with Adaptive Bitrate (ABR). ABR is traditionally not available with WebRTC and Steve Miller Jones uses this as an example of where Limelight is helping this technology achieve its true potential.
Comparing and contrasting Limelight’s solution with HLS and CMAF, we can see the benefit of WebRTC and that it’s equally capable of supporting features like encryption, Geoblocking and the like.
Ultimately, the importance of latency and the scalability you require may be the biggest factor in deciding which way to go with your sub-second live streaming.
Date: Tuesday Jan 29th, 2018 11am PT / 2pm ET / 19:00 GMT
In this webinar Limelight discuss some of the challenges with delivering low latency video and take a deeper dive to look at what causes latency, the WebRTC protocol and how Limelight Networks delivers real-time streaming at global scale.
Topics that will be discussed during this webinar include:
Challenges delivering low-latency video
Various approaches for reducing latency (small chunk HLS, peer-to-peer, WebRTC)
Encoding and codecs
Stream access and security
How to implement interactivity into live streaming video
Technical Product Marketing Manager
Webinar: Thursday, December 7 – 11:00am PT / 2:00pm ET / 19:00 GMT
Keith Weinberger from Limelight with colleague Charles Kraus discuss latency. As viewers spend more time online watching live and on-demand video content, broadcasters and content distributors are under increasing pressure to deliver an exceptional low-latency live video streaming and on-demand experience, on any device.
Join the video delivery experts from Limelight Networks when they share strategies for implementing a cost-effective solution at global scale, without sacrificing the quality your audiences expect. They will also discuss how to:
Deliver live video at 3 to 5 second latencies through HLS and DASH chunked streaming techniques or sub-second latencies through emerging WebRTC technology
Reach the widest possible audience with multi-device streaming
Optimize all points in your video workflow to ensure broadcast-quality experiences
REGISTER NOW for Overcoming the Latency Hurdle in Delivering Streaming Video.
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