Life used to be simple; you’d fire up your camera, point it at a presenter and it would be fed to the transmitter network. When on-going funding came into play, we wanted each transmitter to be able to show local ads and so, after many years, SCTE-35 was born to do exactly that. In today’s world, however, simply telling a transmitter when to switch doesn’t cut it. To deliver the complex workflows that both linear and OTT delivery demand, SCTE 224 has arrived on the scene which provides very comprehensive scheduling and switching.
Jean Macher, from Harmonic explains this needs for SCTE 224 and what it delivers. For instance, a lot for 224 is devoted to controlling the US-style blackouts where viewers close to a sports game can’t watch the game live. Whilst this is relatively easy to deal with in the US for local terrestrial transmitters, in OTT, this is a new ability. Traditionally, geo-location of IP addresses is needed for this to work where each IP address is registered against a provider. If this provider is Chinese, then at the very least, you should be able to say that this IP address is in China. However, for ISPs who have an interest in the programming, they can bring in to effect their own data in order to have very accurate geo-location data.
SCTE 224, however, isn’t just able blackouts. It also transmits accurate, multi-level, schedule information which helps scheduling complex ad breaks providing detailed, frame accurate, local ad insertion.
It shouldn’t be thought that SCTE 35 and SCTE 224 are mutually exclusive. SCTE 35 can provide very accurate updates to unscheduled programmes and delays, where the 224 information still carries the rich metadata.
To finish up the talk, Jean looks at a specific example of the implementation and how SCTE 224 has been updated in recent years.
There is no doubt that streaming video is here to stay. Every month, more consumers log into and subscribe to one or more OTT services. But as those services grow beyond geographical borders, providers are forced to ensure that their offerings can meet the demands of a swelling user base located around the world. Given that this involves employing the public Internet to deliver video to different pockets of the globe, OTT operators often struggle with implementing the best video delivery architecture: what infrastructure to purchase, to install, where & which partners to employ, and how to ensure the best possible viewer experience. This webinar explores some of the proven methods for scaling video delivery as well as best practices employed by some of the world’s biggest streamers.
Head of Exploration,
President-Chair at Ultra HD Forum,
VP Video Strategy, Harmonic
Streaming Video Alliance
Latency seems to be the new battleground for streaming services. While optimising bandwidth and quality are still highly important, they are becoming mature parts of the business of streaming where as latency, and technologies to minimise it – as Apple showed this month – are still developing and vying for position.
Here, the Streaming Video Alliance brings together people from large streaming services to explore this topic finding out what they’ve been doing to reduce it, the problems they’ve faced and the solutions which are on the table.
Low latency streaming is always a compromise, but what can be done to keep QOE high?
This on-demand webinar looks at CMAF and presents some real-world data on this low latency technique. The webinar starts by explaining that CMAF is a low-latency streaming technology similar to HLS and other streaming protocols where the idea is to deliver the video as small files. Olivier and Alain from Harmonic explain how this is done and look at some of the trade-offs and compromises that are needed and introduce techniques to keep QOE high. They also look at deployment in cloud vs. on premise.
Pieter-Jan Speelmans talks about play tradeoffs and optimisations within the player. CMAF allows the buffer to be reduced and whilst a bad network may mean you buffer is similar to ‘normal’, but in good networks, this buffer can be brought down significantly. He also talks about how ABR switching is impacted by GOP length even in CMAF.
Viaccess-Orca explains how DRM works with CMAF and looks at some of the challenges including licences acquisition time and overloading licence servers at the beginning of events. Akamai’s Will Law explains some benefits of CMAF and the near-real-time of chunk-based transfer (HTTP 1.1) and how downloading chunks at full speed leads to problems when the same broadband link is used by several clients.
There are lots of good talks on CMAF, but this is one of the few which talks about CMAF not as theory, but as is deployable today.