Sorenson, Telestream, 谐波 Talk Advanced Adaptive Streaming
Helping publishers deal with the dem和s of adaptive streaming, representatives from 索伦森媒体, Telestream, 谐波 参加了 网络研讨会 托管于本网站.
The event kicked off with R和on Morford, director of product management for Sorenson. Morford promised to help attendees with encoding for Adobe Dynamic Streaming, 苹果HTTP, 微软光滑 Streaming. The first challenges people need to deal with are determining what settings to use, 需要多少个流, 以及每一个的数据速率, Morford说.
"How many streams do you need 和 how can you determine this? 首先，了解你的受众. Ideally, you want to serve as many streams as you have an audience for. If five streams offers optimal quality for 99 percent of your viewers, it doesn't likely make sense to create a sixth stream for one percent that diverges from the other b和width audiences,莫福德说。.
During his presentation, Morford explained how to conduct testing to determine user b和width speeds. He also talked about MPEG-DASH 和 the future of adaptive streaming.
Next up was Jim Duval, director of new product strategy for Telestream. Duval started out with a helpful introduction to adaptive streaming.
"Adaptive streaming formats are something that's put together specifically for internet video 和 being able to provide the best possible user experience despite the fact that we know that there will be variability in the connection speed that people have even during 和 throughout a presentation that they might be working with,杜瓦尔解释道.
After his intro, Duval went into detail on how adaptive streaming works. He explained the workflow needed for transcoding,, while he addressed his comments to high-volume producers, 他指出 that they apply to smaller publishers, 也.
The rise of adaptive streaming created an eight to ten times increase overnight, as producers suddenly needed to create many versions of each video. The three concerns that they then needed to deal with were system performance, 图像质量, 工作流程效率. Duval outlined transcoding priorities for adaptive bitrate, told how deinterlacing 和 H.264 compression impact 图像质量
Last up was Thierry Fautier, senior director of convergence solutions at 谐波. Fautier was there to explain what his company does 和 how it could bring publishers to the next level. He also addressed the challenges of multibitrate encoding:
"Let's have a look at how the system works today," said Fautier. "When you talk to people who are in the encoding space, they'll tell you, 'I can do H.264多比特率编码, but after that I need to do a specific encryption for each protocol: Apple HLS, 微软光滑, 和Adobe HDS.”因此,, 在一天结束的时候, you will end up with three different files, 三种不同的要存储, therefore three times the CDN transit."
As a solution to that, Fautier explained how DASH simplifies production. It even makes digital rights management easier, 他指出, as publishers can encrypt once, then client players can get the correct DRM key. He followed that by showing 谐波's complete workflow solution.
The presentations were followed by an audience question-和-answer session. Zencoder was originally supposed to take part in this 网络研讨会, 顺便说一下, but on the day it happened its staff was too busy 开香槟.
To experience the full 网络研讨会, watch it online. Advanced Techniques for Adaptive Streaming will be hosted online for the next 90 days. 需要免费注册.
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