Draft: draft-ietf-mops-streaming-opcons

Commentary: I made one change to the links , because this gets a 404 : But a web search for " SCTE-214 - 1 " found this instead , which seems to be a new location for the same thing : Additionally , There were 3 more links that failed check- All of these get something with chrome , but fail with curl . The datazoom links get a 403 and the iabtechlab gets a 406 . ( Changing the UA header to match chrome 's made curl succeed with iabtechlab , but not the datazoom links . Did n't dig deeper yet . ) I have n't put in automation for this , but I figure it 's useful to have something at least to do a quick scan . 
 This works . These work just fine for me on chrome no 403 or 406 , plain 200 . 
 They work for me in chrome also , but they do n't work in curl or wget so the script complains about them . 
 Looks good to me , modulo a Github Action error that we do n't understand . Will merge now , so we can move forward . 
 Just make the change for ACM Mile - High Video Conference .
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The following papers describe how video is encoded, different video
encoding standards and tradeoffs in selecting encoding parameters.
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The following papers summarize the methods for selecting packaging
configurations such as the resolution-bitrate pairs, segment
durations, use of constant vs. variable-duration segments, etc.
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The following links describe some of the issues and solutions
regarding the interconnecting of the content delivery networks.
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The two surveys describe and compare different rate-adaptation
algorithms in terms of different metrics like achieved bitrate/
quality, stall rate/duration, bitrate switching frequency, fairness,
network utilization, etc.
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The following papers describe the peculiarities of adaptive streaming
in low-latency live streaming scenarios.
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The following papers explain the benefits of server and network
assistance in client-driven streaming systems.  There is also a good
reference about how congestion affects video quality and how rate
control works in streaming applications.
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The following papers describe various QoE metrics one can use in
streaming applications.
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The following papers explain the latest developments in the immersive
media domain (for video and audio) and the developing standards for
such media.
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5G new radio and systems technologies provide new functionalities for
video distribution. 5G targets not only smartphones, but also new
devices such as augmented reality glasses or automotive receivers.
Higher bandwidth, lower latencies, edge and cloud computing
functionalities, service-based architectures, low power consumption,
broadcast/multicast functionalities and other network functions come
hand in hand with new media formats and processing capabilities
promising better and more consistent quality for traditional video
streaming services as well as enabling new experiences such as
immersive media and augmented realities.
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Ads can be inserted at different stages in the streaming workflow, on
the server side or client side.  The DASH-IF guidelines detail
server-side ad-insertion with period replacements based on
manipulating the manifest.  HLS interstitials provide a similar
approach.  The idea is that the manifest can be changed and point to
a sub-playlist of segments, possibly located on a different location.
This approach results in efficient resource usage in the network, as
duplicate caching is avoided, but some intelligence at the player is
needed to deal with content transitions (e.g., codec changes,
timeline gaps, etc.).  Player support for such content is gradually
maturing.  Other important technologies for ad insertion include
signalling of ads and breaks that is still typically based on SCTE-35
for HLS and SCTE-214 for DASH.  Such signals provide useful
information for scheduling the ads and contacting ad servers.  The
usage of SCTE-35 for ad insertion is popular in the broadcast
industry, while the exact usage in the OTT space is still being
discussed in SCTE.  Another important technology is identification of
ads, such as based on ad-id or other commercial entities that provide
such services.  The identification of the ad in a manifest or stream
is usually standardized by SMPTE.  Other key technologies for ad
insertion include tracking of viewer impressions, usually based on
Video Ad Serving Template (VAST) defined by IAB.
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There are different contribution and ingest specifications dealing
with different use cases.  A common case is contribution that
previously happened over satellite to a broadcast or streaming
headend.  RIST and SRT are examples of such contribution protocols.
Within a streaming headend the encoder and packager/CDN may have an
ingest/contribution interface as well.  This is specified by the
DASH-IF Ingest.
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WebRTC is increasingly being used for streaming of time-sensitive
content such as live sporting events.  Innovations in cloud computing
allow implementers to efficiently scale delivery of content using
WebRTC.  Support for WebRTC communication is available on all modern
web browsers and is available on native clients for all major
platforms.
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Editor's note: The link above might or might not be changed during
IESG Evaluation.  See https://github.com/ietf-wg-mops/draft-ietf-
mops-streaming-opcons/issues/114 [5] for updates.
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Thanks to Alexandre Gouaillard, Aaron Falk, Chris Lemmons, Dave Oran,
Glenn Deen, Kyle Rose, Leslie Daigle, Lucas Pardue, Mark Nottingham,
Matt Stock, Mike English, Renan Krishna, Roni Even, Sanjay Mishra,
and Will Law for very helpful suggestions, reviews and comments.
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Thanks to Alexandre Gouaillard, Aaron Falk, Chris Lemmons, Dave Oran,
Eric Vyncke, Glenn Deen, Kyle Rose, Leslie Daigle, Lucas Pardue, Mark
Nottingham, Matt Stock, Mike English, Renan Krishna, Roni Even,
Sanjay Mishra, and Will Law for very helpful suggestions, reviews and
comments.