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NDI Midi is used within Sienna's NDI Processing Engine as a generic control protocol between modules and the outside world. This uses real time stand alone NDI Metadata frames to carry any sort of Midi message including Midi Machine Control, and controller data.

In February 2019 Gallery Sienna published a proposal for the carriage of MIDI messages via NDI.

Gallery Sienna implemented this standard into their Sienna NDI SourceMulti product, and the proposal is also being adopted by other NDI product developers. It can be passed to an equivalently compatible decoder for reconversion to SDI along with intact C708 captions. This is carried as video frame-based attached metadata. It involves capture of the appropriate line of SDI VANC data, and text based encoding to be compatible with XML.

In August 2018, Gallery Sienna published a proposal for the carriage of C708 Closed Caption metadata via NDI.

There are 5 published examples of 3rd Party NDI Metadata Schemes:

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Send with NDI Embedded SDK, Receive with Free NDI Libraries Hardware encode, Decode with NDI Libraries Gigabit / Wireless / Load Balanced Multi NIC / 10GBitД«onjour (mDNS), NDI Access (manual), Server (NDI4)ДЇree license, SDK Libraries for Win(x86), Mac, Linux(x86 & ARM), iOS, FPGA reference ParameterДiscrete Audio, Metadata and Video Frame packets, single connectionДelivered as Discrete Audio, Metadata and Video Frame packets, single connectionДiscrete A, V, Essence and Metadata on separate connections with different protocols There are clear differences in the technology used by these protocols.

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ProBel/BMD Router Emulation for NDI NetworkДЇFmpeg 3.4 to 4.1 (removed in upcoming 4.Other IP Video protocols emerging for use in professional video production (rather than IP Video used for distribution to end users) include SMPTE 2022, SMPTE2110, ASPEN (which appears to have been largely superseded by SMPTE2110) and Sony NMI. The table below includes a partial list of products known to support the NDI Protocol Vendor

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The NDI Protocol has been widely adopted by a diverse variety of software and hardware vendors. Sienna also implemented this as a Precision_Time_Protocol converter which captures this data and feeds it as NDI into multiple NDI systems wanting to share this information, such as software to interact with AES67 devices.

In April 2019 Gallery Sienna published a proposal for the carriage of PTPv2 timing and GMID within NDI.

iXML allows for unambiguous description of stream contents, and linkage between streams.

In April 2019 Gallery Sienna published a proposal for the use of the industry standard iXML Metadata protocol within NDI.

There are 4 published examples of 3rd Party NDI Metadata Schemes: Other IP Video protocols emerging for use in professional video production (rather than IP Video used for distribution to end users) include SMPTE 2022, SMPTE2110, ASPEN (which appears to have been largely superseded by SMPTE2110) and Sony NMI.