NASA Relies on Teradek for the Official Eclipse 2017 Multicast 在线直播
NASA EDGE is the most popular video podcast for National Aeronautics and Space Administration. It delivers episodic videos and live webcasts for NASA-related events (rocket launches, 轨道机动, 天文事件, 等.). 在过去的十年里, NASA EDGE has produced more than 135 episodes and 25 live webcasts via Ustream.
Most of NASA EDGE's live webcasting and production needs are managed within NASA’s infrastructure. 然而, 今年夏天早些时候, we had the opportunity to provide an off-site, live webcast using a Teradek Cube 155 we acquired from NASA’s Marshall Space Flight Center. The Teradek allowed us to deliver the program feed through the firewall (negotiated) back to NASA Langley, where it was captioned and shared with all interested parties.
This capability opened several new opportunities for us. We’re no longer limited to a single distribution platform. If the network strength is there, we can send our program feed back to NASA Langley to be captioned and then distributed either via broadcast and/or the web.
之前, we were not able to provide captioning, and we were limited to one stream (Ustream, 脸谱网, 或YouTube). Teradek has given us more flexibility with regard to our broadcast location and the ability to provide better distribution.
Teradek products changed our entire approach to covering the Eclipse. 对于这次活动, we needed to provide a program feed for the audience along with four additional feeds for our telescopes (three independent solar scopes at different frequencies and one feed with processed video imagery of the eclipse).
The additional feeds were helpful for multiple reasons. 第一个, different portions of the eclipse were more spectacular at different frequencies, so we needed constant coverage across the three frequencies. 也, we wanted to utilize each frequency for our program in addition to sharing them in the clear for fellow broadcasters. There is no way we could justify the satellite truck and transmission costs to provide all of these feeds. After our experience earlier this year, we knew we could meet everyone’s needs using Teradek products.
Our workflow involved us using 5 Teradek Cubes to take each telescope feed (H-Alpha, Calcium-K, 白光), a processed imagery video feed, as well as our program feed, and make them available for live broadcast.
This post-processed imagery was sourced from a computer attached to a Teradek, which sent the stunning video sequences to its own dedicated Ustream channel.
Finally, our program feed was sourced from a switcher to our captioning device. 从那里, it was sent to a distribution amp where the show was sent to our on-site satellite truck and to our final Cube. This final Cube sent our program feed to CORE, where it was multicasted live across multiple online sites (Ustream, 脸谱网, YouTube和其他网站).
This article was submitted as an exclusive to 流媒体 by Teradek. 了解更多有关 filming process in this FD Times article. 了解更多有关 这里是Teradek工作流.
相关文章
NASA is seeking partners to help the agency tell the story of lunar exploration in new ways that engage, 激发, and inspire a worldwide audience.
11月12日
Roku owners can now enjoy a live view of the solar system, and Harmonic technology is behind the UHD HDR service, which it claims is a world first.
2018年9月13日
Companies and Suppliers Mentioned