RIST is a streaming protocol which allows unreliable/lossy networks such as the internet to be used for critical streaming applications. Called Reliable Internet Stream Protocol, it uses a light-touch mechanism to request any data that’s lost by the network. As losses are often temporary and sporadic, the chances are that the data will get through the second or, perhaps, third time. For a more in-depth explanation of RIST, check out this talk from Merrick Ackermans
The panel here at the IBC 2019 IP Showcase give an brief definition of RIST and then examine how far they’ve got with the ‘Simple Profile’ of RIST calling out things that are yet to be done. Still on the to-do list are such things as ‘pull’ streams, encryption, simplifying the port structure and embedding control.
Fixed Key encryption comes under the microscope next asking whether there’s a practical threat in terms of finding the key but also in terms of whether there are any side-channel attacks in a ‘non-standard’ encryption. The fixed key encryption has been implemented in line with NIST protocols but, as Kieran highlights, getting enough eyes on the detail is difficult with the specification being created outside of an open forum.
The panels covers the recent interop testing which shows overall positive results and then discusses whether RIST is appropriate for uncompressed video. Already, Kieran points out, Amazon Direct Connect is available in 100s of Gb/s links and so it’s completely possible to do uncompressed to the cloud. RTP is over 20 years old and is being used for much more than ever imagined at the time. As technology develops, use of RIST will also develop.
What are the other uses for RIST? Videoconferencing is one possibility, creating a generally secure link to equipment and ingest into the cloud are the others offered.
The panel fishes by looking to the future. Asking how, for instance, the encoder could react to reduced quality of the link. How much of the all the technology needed should be standardised and what features could be added. Sergio Ammirata suggests opening up the protocol for the bandwidth estimation to be requested by any interested device.
This session, bringing together DVEO, OBS, Zixi and Net Insight finishes with questions from the audience.
RIST and SRT are gaining more and more traction as they solve the reliability question over internet contribution. Promising cheaper costs than dedicated circuits, so much of our life uses the internet, it seems logical that it helps connect broadcasts as much as it does video conferences.
SRT and RIST are both protocols which allow streaming of video and other media over networks. If any packets go missing then the receiver will let the sender know and the sender will retransmit the missing data. All being well, these missing packets will arrive in time and no one will know that any data loss took place.
SRT was started by Haivision and is now an open source collaboration with a public repository and slack workspace. It goes beyond simple retransmission and actually offers an encrypted link which is so important when it comes to sports and other high value content.
RIST is being developed by the Video Services Forum (VSF) and the specifcation TR-06 defines how it works. This is is released as a freely-available specification and implementations based on the first release were shown at IBC2018. For a video on RIST, check out this talk from Merrick Ackermans
The RIST working group comprises people from Haivision, Zixi, NetInsight and other companies many of whom also have similar technologies. So the question is why is RIST of so much interest and what are the differences and benefits to SRT?
This Webinar from Net Insight sets out to answer just this question as we’ll as looking to the future to see what is yet to come on the RIST roadmap.
Tasked with producing more live coverage with squeezed resources, broadcasters are turning to remote live productions.
This webinar looks at how correctly implemented, remote productions can reduce the movement of people and equipment; increase the utilization of equipment; reduce on-site set-up times; and maximize the efficiency of production teams.
Have you worked on remote (@ home) live productions?
Are you planning to implement remote (@ home) live productions?
Are you looking for new, innovative ways to increase the efficiency and reach of your live production operations?
Video: 24 minutes
A brilliant look at all the delays in broadcasting from traditional linear channels to live internet streaming. Anders Cedronius from Net Insight discusses what is acceptable and what is achievable in today’s world? Can live streaming delay match, or even beat, traditional broadcast delays?
Recorded at Streaming Tech Sweden, a Swedish conference with a dedicated focus on the technology for video streaming. Organised by Eyevinn Technology, this is the meeting place for tech managers, architects, developers and product managers looking to be educated and inspired by experts in this area, network with peers and bring home new thoughts and ideas.
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