is-04
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AMWA-TV
AMWA IS-04 NMOS Discovery and Registration Specification (Stable)
It appears that a node can be set to unicast or multicast only service discovery: https://specs.amwa.tv/is-04/releases/v1.2.2/docs/3.0._Discovery.html "‘Peer to Peer’ mode only supports multicast operation. Nodes may optionally be configured to...
Discussed at the Ely workshop... Flow `media_type` and Receiver `caps.media_types` (and the Parameter Constraint `urn:x-nmos:cap:format:media_type`) is defined everywhere as "IANA assigned". E.g. https://github.com/AMWA-TV/is-04/blob/0c48726e537574915ed9ef6cf550cc4a9fb57a74/APIs/schemas/flow_video_coded.json#L15 Do we really need these to be...
This is a follow up to a conversation in an issue logged with the NMOS API Testing Tool (AMWA-TV/nmos-testing#722). Currently the Server Side Implementation Notes state that "all NMOS APIs...
[VSF TR-08](https://videoservicesforum.com/download/technical_recommendations/VSF_TR-08_2022-04-20.pdf) defines two Timing Recovery Modes for Receivers: SYNC and ASYNC. These are based on ST 2110-21 Type W and Type A Receivers.  Using BCP-004-01 Receiver Capabilities, Receivers...
What is the best practice is for advertising receivers on a device that can accept both ST 2110-20 and ST 2022-6 streams? The AMWA schemas appear to separate "video/raw" and...
I'm noting a few items here which I've previously discussed with @garethsb-sony just so they're noted down somewhere more public. These are just ideas at present and have not yet...
This came up in review for proposed v1.3.1 `2.1. APIs - Common Keys.md` mentions possibly using future format subclassifications such as `urn:x-nmos:format:video.raw`. Should this be removed/deprecated, as in practice we...
[flow_sdianc_data.json](https://github.com/AMWA-TV/nmos-discovery-registration/blob/v1.2.x/APIs/schemas/flow_sdianc_data.json) has the regex pattern for both DID and SDID as `^0x[0-9a-fA-F]{2}$`. There are no examples in the spec repo, but it is clear this requires exactly two hex digits...
Whilst the signalling of many codecs and transport types should be obvious, some may be less clear. A couple of specific cases are noted below: * J2K (or other) coded...
TCP Keep Alives and WebSocket Ping/Pong are optional for clients/servers to implement. Whilst clean disconnections will be gracefully managed by WebSocket clients and servers, unexpected connection interruptions may not be...