The limitation of stream outputs may be due in part to the amount of processing required for the video and audio pre-processing.
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Streaming targets can also be independently configured per video stream, but the number of independent output streams is limited to four total, with the ability to simultaneously archive the streaming files for later on-demand use. While a TriCaster is capable of streaming via RTMP, the Wowza Streaming Engine in the MediaDS can vary the bitrates (i.e., transrate) or even the output codecs (i.e., transcode) to allow for delivery via the iOS-focused Apple HTTP Live Streaming (HLS) or even the industry-standard MPEG-DASH delivery protocol, both of which use thousands of small files (segments) to deliver live or on-demand video content over HTTP to Android, iOS, and desktop operating systems. The benefit of combining a media server in the same multi-input encoder is key to expanding the reach of streams generated by the MediaDS. The ingest side of the MediaDS is tied to an equally powerful media server, a device-specific version of the Wowza Streaming Engine. Because NDI operates at the 20-35 millisecond range, the merging of separate NDI audio and video can be accomplished in less than the time it takes to display a single frame of video. The benefit for the MediaDS user, especially one who already has a TriCaster on the local network, is the ability to pull real-time video delivery from a TriCaster or 3Play and audio from a separate audio mixer, both via NDI, and then merge the two together at the encoder prior to RTMP encoding. (See this technical document for more on NDI.) The audio and video transport protocol, formally known as the Network Device Interface technology, is an innovative UDP/TCP combination that streams high-resolution, frame-accurate content via specifically assigned TCP ports. The second way to insert audio is via a proprietary technology that NewTek has been championing over the past two IBC and NAB shows: NDI. Dante and other audio networking protocols operate at the single-clock-cycle level, typically around 2-3 milliseconds delay, and transport audio across local area networks via Ethernet.
The first is via the Dante audio networking protocol, licensed by Audinate to a number of sound card and audio mixing board manufacturers, meaning that audio can be inserted into a stream from a multi-channel mixing board in real-time. On the audio front, there are two other ways to ingest audio. In addition, the company offers waveforms and vector scopes to monitor and modify the incoming SDI signal, allowing the encoder to adhere to broadcast specifications for white levels as well as color gamut. The MediaDS adds a nice touch for multiple ingest points, offering four 3G-SDI inputs, each one encoded as an RTMP stream with up to four channels of embedded audio (two stereo pairs) via NewTek’s integrated encoding software. While there’s been lots of talk about the death of RTMP, the NewTek team has championed its continued use for live streaming to a variety of social media platforms, including Facebook Live, Microsoft Azure, and even the Wowza CDN service offered by Wowza for live event streaming from its Wowza Streaming Engine media server software. markets) to be captured and encoded into an RTMP stream.
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Like most encoders with an integrated streaming server, the MediaDS offers a 3G serial digital interface (SDI) input that allows 1080p 59.94 (or 1080p50 in non-U.S.
Powered by the video ingest technologies NewTek is famous for, including advanced color correction demonstrated in the TalkShow100 product we covered last year, the MediaDS can act as a multi-stream distribution system for content generated by the NewTek TriCaster video mixer product line. The MediaDS unit comes in a one rack-unit (1RU) form factor and is priced at $11,995. First announced at IBC in Amsterdam last September, the NewTek/ Wowza Media Systems MediaDS (Media Distribution System) is now available for immediate purchase.
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