59 HAPPENING Vortech.by
Words by Adrian Pennington FEED finds out why it’s all about cloud at Vortech.by, the inaugural conference for video coders and software engineers INTO THE VORTECH
osted in Stockholm by media asset management software developers, Vidispine, Isak Jonsson, CTO and co-founder,
depending on bandwidth conditions at the user’s end) and sent to origin servers running Apache modules for packaging in HLS and Dash with rights management. The live capture to VOD workflow is managed in one of two ways. The first is by taking the live stream out of AWS Elemental and passing that to S3. Then, when the event is finished, back to S3 to find the files needed to create the VOD. “The one drawback is that content is already encoded, so you are relying on fragments (files) that already exist,” said Kalkanis. “We can only be as accurate as those fragments, which means there’s more room for error.” The second path is to capture source video from playout, then transcode in the process of creating the VOD assets. The advantage here, she explained, is frame accuracy and the output of a higher- quality video asset. While the first is faster and easier – since there’s no additional transcode – the risk is a lower-quality VOD. The trade-off with the second path is the expense of using more AWS resource, but a reduced bit rate at the end. “You’ve got to want it and you’ve got to have enough audience for it,” she explained. Another essential for any live streamer is constantly reviewing all aspects of the service and figuring out where incremental improvements can be made.
described the Vortech conference as a set of “fluid ideas”, designed for geeks – “people like me”. And FEED , it turns out. Over fika (the Swedish break for coffee and cakes), which seems to happen just about any time of day, we learned about the hard work and earnest discussion that goes into getting a drama like Killing Eve, or a live sport event like a Merseyside derby, onto the device of your choice. In a nutshell: it’s all about cloud. DAZN TO YOUR DEVICE M2A Media explained how its software underpins the worldwide live streaming for sports rights website, DAZN. “Major live event streamers need to plan for hundreds of thousands, even millions, of concurrent users, especially when several events happen worldwide at the same time,” said M2A Media CEO, Marina Kalkanis. “Scaling this up is only possible if you take advantage of the cloud.” For DAZN, the live playout signals are captured to two data centres and unicast either in RTP with forward error correction or Haivision SRT to AWS Elemental Live. From the encoder, the feeds are encoded into the ABR ladder (which automatically assigns different bit rates for the video
NO ASSEMBLY REQUIRED Stockholm was the perfect host for Vortech.by, not least for all the fika FEED enjoyed!
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