ORTC SVC SimulCast

Sep 27, 20155 likes2,097 views

This document discusses ORTC SimulCast and how it differs from WebRTC 1.0. It explains that ORTC is WebRTC 1.0 plus SimulCast and multi-stream interoperability. It then defines SimulCast and describes AVC and SVC SimulCast approaches. It provides details on SVC including base layers, enhancement layers, parameters like temporal, spatial and quality layers. The document also outlines the changes in the ORTC API compared to the previous PeerConnection API and provides an overview of the new classes-based architecture. It notes that WebRTC NV will merge aspects of ORTC and ends by providing additional resources.

● id: Jxck
● github: Jxck
● twitter: @jxck_
● about: http://jxck.io
● blog: http://jxck.hatenablog.com
● podcast: http://mozaic.fm
● Love: music
Jack

ORTC ≒
WebRTC 1.0 +
SimulCast +
MultiStream interop
5

AVC Simulcast
8
● re-encoding for each client capability, network
○ heavy resource
○ latecy at server

SVC Simulcast
9
● SVC encode at client
○ multi layered video
○ router choose a layer

SVC(scalable video coding)
11
● multi layered coding
○ 1-base layer
○ n-enhancement layer
● parameter
○ Temporal (frame rate)
○ Spatial (resolution)
○ Quality (SNR)

layer
● base layer
○ lowest quality for video conference
○ small size
○ error correction
● enhancement layer
○ merge with base layer
○ more size
○ fallback to base layer if lost
● layer choice
○ layer routing server choice
○ negotiation, bandwidth estimation etc
15

before / after PeerConnection
18
// before
let peer = new PeerConnection();
// call these during singalling
peer.addStream();
peer.onnegotiationneeded;
peer.createOffer/Answer();
peer.setLocal/RemoteDescription();
peer.onicecandidate;
peer.addIceCandidate();
// ALL API are on PeerConnection Class

before / after PeerConnection
19
// after
let iceGatherer = new RTCIceGatherer(iceGatherOptions);
let iceTransport = new RTCIceTransport(iceGatherer);
let dtlsTransport = new RTCDtlsTransport(iceTransport);
let rtpSender = new RTCRtpSender(mediaStreamTrack, dtlsTransport);
let rtpReceiver = new RTCRtpReceiver(dtlsTransport);
let sendCapas = RTCRtpSender.getCapabilities('video');
let recvCapas = RTCRtpReceiver.getCapabilities('video');
// exchange caps
// ALL API are on each Classes

before / after DataChannel
20
// after
let iceGatherer = new RTCIceGatherer(iceGatherOptions);
let iceTransport = new RTCIceTransport(iceGatherer);
let dtlsTransport = new RTCDtlsTransport(iceTransport);
let sctpTransport = new RTCSctpTransport(dtlsTransport);
let channel = new RTCDataChannel(sctpTransport);
// before
peerConnection.createDataChannel((channel) => {
});

SVC
21
var encodings = [
{
// 低解像度ベースレイヤ(1/2 フレームレート 1/2 解像度)
encodingId: "0",
resolutionScale: 2.0,
framerateScale: 2.0
},
{
// 拡張解像度ベースレイヤ(1/2 フレームレート 1/1 解像度)
encodingId: "E0",
resolutionScale: 1.0,
framerateScale: 2.0
},
{
// 低解像度ベースへの拡張レイヤ (1/1 レート, 1/2 解像度)
encodingId: "1",
dependencyEncodingIds: ["0"],
resolutionScale: 2.0,
framerateScale: 1.0
},
{
// 拡張解像度ベースへの拡張レイヤ (1/1 レート, 1/1 解像度)
encodingId: "E1",
dependencyEncodingIds: ["E0"],
resolutionScale: 1.0,
framerateScale: 1.0
}
];

complicated ?
22
classes based on protocol stack
http://www.slideshare.net/iwashi86/20140801-web-rtcmeetup3r3

more:
http://jxck.hatenablog.com/entry/ortc-to-webrtcnv
24

This document discusses how exposing low-level capabilities of the web platform can allow developers to extend it forward. It argues that technologies like ServiceWorker, Fetch, Cache, and others provide low-level APIs that explain existing features like HTML and CSS. This allows authors to understand and replicate them. It provides examples of how these low-level APIs can be used for offline applications and beyond. The document advocates wrapping these APIs in new libraries and frameworks to build the next generation of the web.

Extensible webJxck Jxck

This document discusses extending the capabilities of the web by exposing low-level application programming interfaces (APIs). It argues that browser vendors should lead this effort by first implementing proof-of-concepts based on low-level APIs, then creating specifications based on feedback. This would allow web developers to build on these foundations and extend the web in new ways. As an example, the document discusses how the author implemented the Fetch API across Node.js and browsers to allow truly isomorphic code. It presents a vision of compounding these efforts to eventually implement higher-level APIs like XMLHttpRequest on top of lower-level APIs, extending the capabilities of the web platform.

Http2 on go1.6rc2Jxck Jxck

This document discusses HTTP/2 support in Go 1.6. It notes that the net/http package now supports HTTP/2 out of the box. It provides code samples showing how a server can be configured with and without HTTP/2 support. It also describes how HTTP/2 functionality like HPACK header compression, server push, flow control, and priority are implemented in Go net/http. Finally, it summarizes the current level of HTTP/2 specification compliance and areas still in development.

Python Static Site Generator in PelicanGaurav Sehrawat

This document discusses Pelican, an open source static site generator that uses Markdown files and Jinja templates to build static websites without a database. Pelican is Pythonic, easy to use, and has a large community and many themes and plugins available. The document provides instructions on installing Pelican using pip and generating a basic static site by creating Markdown content files and running Pelican commands to build the HTML output.

Як РНР розробник пише код на Kotlinphpfriendsclub

HTTP2Study chronicle #http2confJxck Jxck

This document summarizes the local activities in Japan related to HTTP/2, including meetups organized by the HTTP2Study group to discuss the HTTP/2 specification and implementations. The group also organizes hackathons and issues discussions. Resources produced by the group include test cases for the HPACK header compression format and a work-in-progress test case for HTTP/2 frames. The group maintains a wiki documenting implementations in Japan and guides for building simple HTTP/2 clients and servers. Upcoming activities include meetups at HPBN and IETF 91 to discuss HTTP/2.

Dev + DevOps для PHP розробникаphpfriendsclub

Ruby e xmppWillian Molinari

This document discusses using Ruby and XMPP for building messaging applications. It recommends using the Blather library to connect to XMPP and DaemonKit for managing Ruby processes as daemons. DaemonKit provides a Rails-like structure and tools for logging, starting, stopping processes and managing environments. An example shows registering a user on Ejabberd, a popular XMPP server, in a simple way using the ejabberdctl command.

Breaking the RpiDocker challenge Nicolas De Loof

The document summarizes the efforts of three individuals to break the RPiDocker challenge of running the most Docker containers on a Raspberry Pi 2. They took a methodical approach, measuring performance and automating setup. Key steps included systemd and Docker tuning, using a highly optimized web server, and addressing the RPi2's network namespace limit. Collaboration and sharing ideas helped optimize the process and ultimately run 2499 containers, hitting a Go runtime thread limit. Working around the limit confirmed the ability to run nearly 2740 containers before hitting memory limits.

PHP QA Toolsrjsmelo

Doing Quality Assurance in PHP projects sometimes looks like a dark art! Picking the right tools, making all tools work together, analysing your code and even then deliver all the required features of the software project can be quite challenging. This talks aims to help lowering the entry barrier for doing QA on your project, sharing the experience, knowledge and some tricks that brings QA back from the dark arts to the every day of a PHP programmer. We will review tools like Jenkins, PHPUnit, phpcs, pdepend, phpcpd, etc and how we can chain them together to make sure we are building a great software.

Chromium: NaCl and Pepper APIChang W. Doh

Native Client (NaCl) is an open-source technology that allows native code to run safely inside web browsers. It provides native code functionality and performance while maintaining security. NaCl code is sandboxed using a double sandbox model and only accesses system resources through a safe API. The Portable Native Client (PNaCl) variant compiles code into a portable format that can run on multiple platforms.

Docker & PHP - Practical use caserjsmelo

Intro to GO (Bangkok Launchpad 2014)Matthew Campbell

The document introduces GO and discusses why a consulting firm chose to build an instant messaging server using GO. It provides an overview of GO, including that it is a lightweight programming language developed by Google that uses garbage collection and makes concurrency easy using goroutines and channels. The document also provides code samples and discusses getting started with GO development.

Making your first contribution to ForemanDominic Cleal

This document provides guidance on how to make contributions to the Foreman project. It discusses managing issues in Redmine, setting up a development environment, crafting code patches, submitting pull requests, and the review process. Specific issues are listed that could be worked on, related to Foreman core, the Foreman installer plugin, and the Hammer CLI. The goal is to welcome and guide new contributors.

Opensource pnp container based wafVarun konadagadapa

Working with npm packagesTomasz Bak

The document discusses working with npm packages. It provides guidance on how to find suitable npm packages based on quality, GitHub activity, and downloads. It outlines steps for modifying existing packages such as forking the repository, making changes locally or as a pull request. The document also describes how to create and publish a new npm package by initializing it with npm, adding metadata to the package.json file, and publishing updates to npm.

Cache in Chromium: Disk CacheChang W. Doh

The document discusses Chromium's caching system. It describes the overall network stack and cache flow, including the disk cache which stores web resources on disk. It then focuses on the "simple cache" implementation, a new backend for disk cache that uses one file per cache entry and an index file for faster lookups. The simple cache aims to be more resilient to corruption, reduce delays, and have lower memory and disk usage than the existing blockfile backend.

Kotlin Coroutines and Android sitting in a tree - 2018 versionKai Koenig

Since the release of Kotlin 1.1 there is now the language feature of Kotlin Coroutines available for use in Java and Android projects. Coroutines are a new way to write asynchronous and non-blocking code. They can be thought of as light-weight threads without having to deal with all the problems that threads bring to the table. A lot of developers think that Kotlin Coroutines are mainly or only useful for Kotlin on the JVM, but that’s not true. There are a variety of use cases in which the application of Coroutines can make a lot of sense on Android. This talk is introducing the ideas behind Kotlin Coroutines, showing how to use them in Kotlin code for both the JVM and Android via the kotlinx-coroutines APIs and then exploring specific applications in Android. Part of this is a deeper look into the use of Coroutines in higher-level frameworks such as AsyncAwait and Anko and how they stack up against other concepts of asynchrony such as rxJava.

[Quality Meetup #20] Michał Górski - Continuous Deployment w chmurzeFuture Processing

W dzisiejszych czasach praca z chmurą pozwala niesamowicie zmniejszyć koszta wejścia na rynek z rozwiązaniami typu PoC i MVP oraz w późniejszych etapach rozwoju produktów skalować oprogramowanie według potrzeb. Niestety nie jest to złoty środekt i rozwiązując stare problemy, tworzy nowe. Dlatego, oprócz zapoznania się z technologią serverless, czy Infrastructure as a Code, spróbujemy przede wszystkim stworzyć bezpieczne środowisko, pozwalające na Continuous Deployment.

[POSS 2019] OVirt and Ceph: Perfect Combination.?Worteks

This document discusses using the open-source virtualization platform Ovirt together with the distributed storage platform Ceph. It evaluates three options for combining Ovirt and Ceph that provide high availability and scalability without single points of failure. The recommended option uses CephFS to provide POSIX-compliant storage for virtual machines hosted on an Ovirt cluster, along with GlusterFS for the Ovirt hosted engine and Ceph monitor nodes. This allows up to seven hosts without any single points of failure.

Golang getting startedHarshad Patil

Go is a statically-typed, garbage-collected programming language that is fast, supports concurrency, and has built-in support for remote package management. It is well-suited for building network servers and applications with non-blocking I/O. The document provides examples of writing a simple "Hello World" program, building a basic HTTP server, and using goroutines for concurrency. It also outlines how to install Go, set up a development environment, and find additional learning resources.

NPM THE GUIDEKameron Tanseli

Kotlin Coroutines and Android sitting in a treeKai Koenig

Since the release of Kotlin 1.1 there is now the new language feature of Kotlin Coroutines available for use in Java and Android projects. Coroutines are a new way to write asynchronous and non-blocking code. They can be thought of as light-weight threads without having to deal with all the problems that threads bring to the table. A lot of developers think that Kotlin Coroutines are mainly or only useful for Kotlin on the JVM, but that’s not true. There are a variety of use cases in which the application of Coroutines can make a lot of sense on Android. This talk is introducing the ideas behind Kotlin Coroutines, showing how to use them in Kotlin code for both the JVM and Android via the kotlinx-coroutines APIs and then exploring specific applications in Android. Part of this is a deeper look into the use of Coroutines in higher-level frameworks such as AsyncAwait and Anko.

pacproxy - Ruby hiroba 2014Hiroshi Ota

Pacproxy is a Ruby gem that allows applications like curl and other gems to access corporate servers behind a proxy using a proxy auto-config (PAC) file. The gem intercepts requests and transfers them to certain destinations defined in the PAC file. It can be configured by adding 'pacproxy' to the Gemfile and running it with the PAC file URL and port. This allows non-browser applications to access internal servers that are normally restricted by the corporate proxy.

PHP and node.js TogetherChris Tankersley

Rust PrimerKnoldus Inc.

Rust has something unique to offer that languages in that space have never had before, and that is a degree of safety that languages like C and C++ have never had. Rust promises to deliver equivalent or better performance and greater productivity with guaranteed memory safety and data race freedom while allowing complete and direct control over memory. This video will cover: What is Rust? Benefits of Rust Rust Ecosystem Popular Applications in Rust

Integrating Node.js with PHPLee Boynton

The document discusses integrating Node.js with PHP by sharing session data stored in Memcached or Redis. It provides examples of using a Memcached session handler in PHP that serializes session data to JSON, and an example Node.js app that retrieves session data from Memcached to identify users. While Node.js enables real-time features, the document argues that PHP still has advantages for many use cases and that the right tool should be chosen for the job.

Last Month in PHP - June 2016Eric Poe

This document summarizes notable updates in the PHP community from last month. It discusses recent patch releases of PHP 5 and 7 that users should upgrade to for security fixes. It also covers security issues with ImageMagick and recommendations for mitigation. Upcoming features in PHP 7.1 are outlined. Updates to frameworks like CakePHP, Laravel, Symfony, and Zend are mentioned. Notable conferences in the coming months are listed.

Webrtc最新動向Yusuke Naka

WebRTC を利用したブラウザキャッシュ共有によるデータ配信システムKazuki Matsushita

More Related Content

What's hot (20)

Breaking the RpiDocker challenge Nicolas De Loof

PHP QA Toolsrjsmelo

Chromium: NaCl and Pepper APIChang W. Doh

Docker & PHP - Practical use caserjsmelo

Intro to GO (Bangkok Launchpad 2014)Matthew Campbell

Making your first contribution to ForemanDominic Cleal

Opensource pnp container based wafVarun konadagadapa

Working with npm packagesTomasz Bak

Cache in Chromium: Disk CacheChang W. Doh

Kotlin Coroutines and Android sitting in a tree - 2018 versionKai Koenig

[Quality Meetup #20] Michał Górski - Continuous Deployment w chmurzeFuture Processing

[POSS 2019] OVirt and Ceph: Perfect Combination.?Worteks

Golang getting startedHarshad Patil

NPM THE GUIDEKameron Tanseli

Kotlin Coroutines and Android sitting in a treeKai Koenig

pacproxy - Ruby hiroba 2014Hiroshi Ota

PHP and node.js TogetherChris Tankersley

Rust PrimerKnoldus Inc.

Integrating Node.js with PHPLee Boynton

Last Month in PHP - June 2016Eric Poe

Breaking the RpiDocker challenge Nicolas De Loof

PHP QA Toolsrjsmelo

Chromium: NaCl and Pepper APIChang W. Doh

Docker & PHP - Practical use caserjsmelo

Intro to GO (Bangkok Launchpad 2014)Matthew Campbell

Making your first contribution to ForemanDominic Cleal

Opensource pnp container based wafVarun konadagadapa

Working with npm packagesTomasz Bak

Cache in Chromium: Disk CacheChang W. Doh

Kotlin Coroutines and Android sitting in a tree - 2018 versionKai Koenig

[Quality Meetup #20] Michał Górski - Continuous Deployment w chmurzeFuture Processing

[POSS 2019] OVirt and Ceph: Perfect Combination.?Worteks

Golang getting startedHarshad Patil

NPM THE GUIDEKameron Tanseli

Kotlin Coroutines and Android sitting in a treeKai Koenig

pacproxy - Ruby hiroba 2014Hiroshi Ota

PHP and node.js TogetherChris Tankersley

Rust PrimerKnoldus Inc.

Integrating Node.js with PHPLee Boynton

Last Month in PHP - June 2016Eric Poe

Viewers also liked (20)

Webrtc最新動向Yusuke Naka

WebRTC を利用したブラウザキャッシュ共有によるデータ配信システムKazuki Matsushita

WebRTC 101Kensaku Komatsu

5分で分るWebRTCコーデックウォーズYusuke Naka

WebRTCでリアル店舗を作ってみるJunichi Okamura

HTML5と WebSocket / WebRTC / Web Audio API / WebGL 技術解説You_Kinjoh

うしちゃん WebRTC Chat on SkyWayの開発コードｗKensaku Komatsu

WebRTCで実現するオンライン英会話の未来WebRTCConferenceJapan

WebRTCライトニングトークス〜 WebRTCを色々使ってみた話infocom corp.

はじめてのWebRTC/ORTCYusuke Naka

PeerConnectionリレーとMediaRecordermganeko

MediaRecorder と WebM で、オレオレ Live Streamingmganeko

スマートフォンでのWebRTC活用minamotot

WebRTCとPeer.jsを使った実装Yuta Suzuki

スマホ(Android・iPhone)でWebRTCNatsuki Yamanaka

ラズパイでWebRTC ヾ(*´∀｀*)ﾉｷｬｯｷｬ uv4l-webrtc 軽くハックしてみたよ！Kensaku Komatsu

WebRTCサービスを個人で運営してみた話Junki Mizushima

WebブラウザでP2Pを実現する、WebRTCのAPIと周辺技術Yoshiaki Sugimoto

色々なデバイスの映像を使ったWebブラウザでのWebRTC映像中継（GotAPIからのWebRTC利用） Device WebAPI Consortium

WebRTCの技術解説公開版Contest Ntt-west

Webrtc最新動向Yusuke Naka

WebRTC を利用したブラウザキャッシュ共有によるデータ配信システムKazuki Matsushita

WebRTC 101Kensaku Komatsu

5分で分るWebRTCコーデックウォーズYusuke Naka

WebRTCでリアル店舗を作ってみるJunichi Okamura

HTML5と WebSocket / WebRTC / Web Audio API / WebGL 技術解説You_Kinjoh

うしちゃん WebRTC Chat on SkyWayの開発コードｗKensaku Komatsu

WebRTCで実現するオンライン英会話の未来WebRTCConferenceJapan

WebRTCライトニングトークス〜 WebRTCを色々使ってみた話infocom corp.

はじめてのWebRTC/ORTCYusuke Naka

PeerConnectionリレーとMediaRecordermganeko

MediaRecorder と WebM で、オレオレ Live Streamingmganeko

スマートフォンでのWebRTC活用minamotot

WebRTCとPeer.jsを使った実装Yuta Suzuki

スマホ(Android・iPhone)でWebRTCNatsuki Yamanaka

ラズパイでWebRTC ヾ(*´∀｀*)ﾉｷｬｯｷｬ uv4l-webrtc 軽くハックしてみたよ！Kensaku Komatsu

WebRTCサービスを個人で運営してみた話Junki Mizushima

WebブラウザでP2Pを実現する、WebRTCのAPIと周辺技術Yoshiaki Sugimoto

色々なデバイスの映像を使ったWebブラウザでのWebRTC映像中継（GotAPIからのWebRTC利用） Device WebAPI Consortium

WebRTCの技術解説公開版Contest Ntt-west

Similar to ORTC SVC SimulCast (20)

Frame accurate video client in the browserJordi Cenzano

The document discusses the motivation and design of a frame-accurate video player that runs in the browser. It was originally developed in 2011 to support journalists but has been updated using modern cloud technologies. The backend processes media files to extract frame-level metadata and transcode video and audio into single-frame files. The frontend then loads these files and allows frame-accurate scrubbing and playback using HTML5 and JavaScript. Both VOD and live capabilities are discussed along with ideas for future improvements.

Mux loves Clickhouse. By Adam Brown, Mux founderAltinity Ltd

Mirko Damiani - An Embedded soft real time distributed system in Golinuxlab_conf

HTML5 Multimedia Accessibilitybrucelawson

An Introduction to AV1 - The Next-Gen Royalty-Free Codec From the Alliance fo...Tanya Vernitsky

Learn from codec and encoding experts at Bitmovin and Mozilla - the two companies behind the world's first AV1 playback with HTML5 - as we discover the cool new video tools in this royalty-free video codec from the Alliance for Open Media. This webinar covers: + A bit about the history that led to AV1 and the current state of the codec + Discover the cool new tools in AV1 brings and compare performance relative to other codecs + Review what's already possible and what to expect next

An Introduction to AV1 - The Next-Gen Royalty-Free Codec From the Alliance fo...Bitmovin Inc

Learn abut AV1 from codec and encoding experts at Bitmovin and Mozilla - the two companies behind the world's first AV1 playback with HTML5 - as we discover the cool new video tools in this royalty-free video codec from the Alliance for Open Media. This webinar covers: + A bit about the history that led to AV1 and the current state of the codec + Discover the cool new tools in AV1 brings and compare performance relative to other codecs + Review what's already possible and what to expect next

COSCUP 2023 - Make Your Own Ray Tracing GPU with FPGAOwen Wu

MOVED: The challenge of SVE in QEMU - SFO17-103Linaro

Criteo Labs Infrastructure Tech Talk Meetup Nov. 7Shuo LI

The document discusses hardware-assisted video transcoding at Dailymotion. It summarizes the legacy software-only transcoding farm and introduces a new GPU-accelerated solution using Intel Media SDK and Nvidia cards. Performance tests showed the new solution was up to 12x faster for single transcodes and had much lower power consumption. Quality was similar or better with look-ahead enabled. The new farm has been deployed successfully.

GamingAnywhere: An Open Cloud Gaming SystemAcademia Sinica

Cloud gaming is a promising application of the rapidly expanding cloud computing infrastructure. Existing cloud gaming systems, however, are closed-source with proprietary protocols, which raises the bars to setting up testbeds for experiencing cloud games. In this paper, we present a complete cloud gaming system, called GamingAnywhere, which is to the best of our knowledge the first open cloud gaming system. In addition to its openness, we design GamingAnywhere for high extensibility, portability, and reconfigurability. We implement GamingAnywhere on Windows, Linux, and OS X, while its client can be readily ported to other OS's, including iOS and Android. We conduct extensive experiments to evaluate the performance of GamingAnywhere, and compare it against two well-known cloud gaming systems: OnLive and StreamMyGame. Our experimental results indicate that GamingAnywhere is efficient and provides high responsiveness and video quality. For example, GamingAnywhere yields a per-frame processing delay of 34 ms, which is 3+ and 10+ times shorter than OnLive and StreamMyGame, respectively. Our experiments also reveal that all these performance gains are achieved without the expense of higher network loads; in fact, GamingAnywhere incurs less network traffic. The proposed GamingAnywhere can be employed by the researchers, game developers, service providers, and end users for setting up cloud gaming testbeds, which, we believe, will stimulate more research innovations on cloud gaming systems. GamingAnywhere is now publicly available at http://gaminganywhere.org.

Rust in TiKVPingCAP

Embedded Recipes 2018 - Upstream multimedia on amlogic so cs from fiction t...Anne Nicolas

Inexpensive set-top boxes are everywhere and many of them are powered by AmLogic SoCs. These chips provide 4K H.265/VP9 video decoding and as of the last couple years, have a very good Mainline Linux and U-Boot support. Unfortunately, most of the multimedia features, like Hardware Accelerated OpenGL ES, Video Decoding, Audio Playback, and Video Rendering were missing from Upstream projects like Linux, Mesa, Gstreamer or FFmpeg. Thankfully a growing community of independent developers have managed to get most of these features to work using upstream only source code. Maxime will present the challenges and benefits to have Multimedia support using upstream projects and will detail the technical challenges to offer a complete Multimedia support on these Amlogic SoCs. The audience is anyone interested in ARM SoCs, multimedia, upstream development process or learning more about the architecture of the AmLogic application processors. Attendees can expect a presentation on the actual work of code upstreamed for the Amlogic SoCs, a multimedia overview and challenges on non-x86 platforms, an overview of the hardware architecture, and much more.

Java fx on raspberry pi gerrit grunwaldNLJUG

JavaFX can be used to create user interfaces for embedded systems like the Raspberry Pi and BeagleBone Black. While Java's "write once, run anywhere" mantra does not directly apply to embedded due to different requirements and constraints, much code can be reused from mobile and desktop applications by focusing on content over elaborate graphics, limiting the number of nodes in the scene graph, and avoiding memory-intensive operations. With optimization, JavaFX applications can run well on embedded devices with as few as 3-60 nodes in the scene graph.

Fun with JavaFX8 on the Raspberry PiNLJUG

Ceph Object Storage Performance Secrets and Ceph Data Lake SolutionKaran Singh

REST vs gRPC: Battle of API'sLuram Archanjo

This document compares REST and gRPC for microservices communication. It discusses how gRPC addresses limitations of REST like inefficient binary encoding and lack of bidirectional streaming. gRPC uses protocol buffers for interface definition and code generation. It supports multiple languages and platforms and uses HTTP/2 for performance. Companies like Google and Netflix use gRPC for its performance advantages. The document provides examples of unary, server streaming, client streaming and bidirectional streaming RPC calls in gRPC. It recommends using gRPC for microservices and client-server applications where performance is important.

838511959.pptxstephentimothypam

This document discusses various approaches for realizing multimedia conferencing applications, including centralized, full mesh, endpoint-based, peer-to-peer, and using IP multicast. It also covers important considerations for multimedia conferencing such as efficient transport, audio processing, conference setup, security, floor control, and audio quality factors like codecs, mixing, jitter, and delay.

London Video Tech - Adventures in cutting every last millisecond from glass-t...Kieran Kunhya

Kieran Kunhya discusses minimizing latency in live broadcast production processes from a software engineering perspective. He summarizes optimizations made to encoding and decoding pipelines that reduced latency from over 200 milliseconds to under 50 milliseconds for 1080i25 video. This included capturing fields instead of frames, decoding video as it arrives on the wire, synchronizing clocks, and exploring chunk-based encoding and decoding of slices. The goal is to reduce glass-to-glass latency in live video workflows through software improvements rather than relying on hardware approaches.

Node.js Web Apps @ ebay scaleDmytro Semenov

EVCache: Lowering Costs for a Low Latency Cache with RocksDBScott Mansfield

EVCache is a distributed, sharded, replicated key-value store optimized for Netflix's use cases on AWS. It is based on Memcached but uses RocksDB for persistent storage, lowering costs compared to storing all data in memory. Moneta is the next generation EVCache server, using Rend and Mnemonic libraries to intelligently manage data placement in RAM and SSD. This provides high performance for both volatile and batch workloads while reducing costs by 70% compared to the original Memcached-based design.

Frame accurate video client in the browserJordi Cenzano

Mux loves Clickhouse. By Adam Brown, Mux founderAltinity Ltd

Mirko Damiani - An Embedded soft real time distributed system in Golinuxlab_conf

HTML5 Multimedia Accessibilitybrucelawson

An Introduction to AV1 - The Next-Gen Royalty-Free Codec From the Alliance fo...Tanya Vernitsky

An Introduction to AV1 - The Next-Gen Royalty-Free Codec From the Alliance fo...Bitmovin Inc

COSCUP 2023 - Make Your Own Ray Tracing GPU with FPGAOwen Wu

MOVED: The challenge of SVE in QEMU - SFO17-103Linaro

Criteo Labs Infrastructure Tech Talk Meetup Nov. 7Shuo LI

GamingAnywhere: An Open Cloud Gaming SystemAcademia Sinica

Rust in TiKVPingCAP

Embedded Recipes 2018 - Upstream multimedia on amlogic so cs from fiction t...Anne Nicolas

Java fx on raspberry pi gerrit grunwaldNLJUG

Fun with JavaFX8 on the Raspberry PiNLJUG

Ceph Object Storage Performance Secrets and Ceph Data Lake SolutionKaran Singh

REST vs gRPC: Battle of API'sLuram Archanjo

838511959.pptxstephentimothypam

London Video Tech - Adventures in cutting every last millisecond from glass-t...Kieran Kunhya

Node.js Web Apps @ ebay scaleDmytro Semenov

EVCache: Lowering Costs for a Low Latency Cache with RocksDBScott Mansfield

More from Jxck Jxck (18)

HTTP2 時代の Web - web over http2Jxck Jxck

Isomorphic Architecture & InterfaceJxck Jxck

HTTP2 RFC 発行記念祝賀会Jxck Jxck

mozaicfm-ep8 #altJS @ll-diverJxck Jxck

Updates of [email protected]Jxck Jxck

Socket.IO version 1.0 was released in June 2014 after 3 years of development. The new version includes improvements like Engine.IO for better performance, an upgraded mechanism, binary support, client libraries hosted on CDNs, better connection handling, debugging tools, and an improved API. It also addresses issues like intermediaries and delays in the handshake process between the client and server. The developer announced plans for Japanese documentation and more meetups around Socket.IO in Japan.

Why HTML Form dose not support PUT & DELETE ?Jxck Jxck

The document discusses why HTML forms have traditionally only supported GET and POST methods, not PUT and DELETE. It provides historical context, from the origins of HTTP/1.0 and HTML 4.0 through proposals in XForms and the current discussions in HTML5. While forms were originally designed for GET/POST submission before Ajax existed, recent draft extensions aim to enhance HTTP request generation from forms to support the full HTTP/1.1 method set through new attributes.

Next generation web talk @cross2014Jxck Jxck

HTTP2 & HPACK #pyfes 2013-11-30Jxck Jxck

Network server in go #gocon 2013-11-14Jxck Jxck

The document discusses network programming and I/O in Go. It begins with an introduction to the speaker and then discusses building TCP servers and clients in Go using packages like net, bytes, encoding/binary, and bufio. It provides code examples of handling connections and reading/writing bytes slices. It also discusses building an HTTP/2 server in Go using goroutines, binary framing, and cryptography libraries.

SPDY & HTTP2.0 & QUIC - #bpstudy 2013-08-28Jxck Jxck

Http2.0 Guide 2013-08-14 #http2studyJxck Jxck

Gtug girls meetup web socket handsonJxck Jxck

Next generation web talk @cross2013Jxck Jxck

Nodefest2011-LiveJxck Jxck

Test it in Node.jsJxck Jxck

Real Time App with Node.jsJxck Jxck

I visited JSConf + NodeConf + JoyentJxck Jxck

Nodejs IntroductionJxck Jxck

HTTP2 時代の Web - web over http2Jxck Jxck

Isomorphic Architecture & InterfaceJxck Jxck

HTTP2 RFC 発行記念祝賀会Jxck Jxck

mozaicfm-ep8 #altJS @ll-diverJxck Jxck

Updates of [email protected]Jxck Jxck

Why HTML Form dose not support PUT & DELETE ?Jxck Jxck

Next generation web talk @cross2014Jxck Jxck

HTTP2 & HPACK #pyfes 2013-11-30Jxck Jxck

Network server in go #gocon 2013-11-14Jxck Jxck

SPDY & HTTP2.0 & QUIC - #bpstudy 2013-08-28Jxck Jxck

Http2.0 Guide 2013-08-14 #http2studyJxck Jxck

Gtug girls meetup web socket handsonJxck Jxck

Next generation web talk @cross2013Jxck Jxck

Nodefest2011-LiveJxck Jxck

Test it in Node.jsJxck Jxck

Real Time App with Node.jsJxck Jxck

I visited JSConf + NodeConf + JoyentJxck Jxck

Nodejs IntroductionJxck Jxck

Recently uploaded (20)

Build Your Own Copilot & Agents For DevsBrian McKeiver

HCL Nomad Web – Best Practices und Verwaltung von Multiuser-Umgebungenpanagenda

Webinar Recording: https://www.panagenda.com/webinars/hcl-nomad-web-best-practices-und-verwaltung-von-multiuser-umgebungen/ HCL Nomad Web wird als die nächste Generation des HCL Notes-Clients gefeiert und bietet zahlreiche Vorteile, wie die Beseitigung des Bedarfs an Paketierung, Verteilung und Installation. Nomad Web-Client-Updates werden “automatisch” im Hintergrund installiert, was den administrativen Aufwand im Vergleich zu traditionellen HCL Notes-Clients erheblich reduziert. Allerdings stellt die Fehlerbehebung in Nomad Web im Vergleich zum Notes-Client einzigartige Herausforderungen dar. Begleiten Sie Christoph und Marc, während sie demonstrieren, wie der Fehlerbehebungsprozess in HCL Nomad Web vereinfacht werden kann, um eine reibungslose und effiziente Benutzererfahrung zu gewährleisten. In diesem Webinar werden wir effektive Strategien zur Diagnose und Lösung häufiger Probleme in HCL Nomad Web untersuchen, einschließlich - Zugriff auf die Konsole - Auffinden und Interpretieren von Protokolldateien - Zugriff auf den Datenordner im Cache des Browsers (unter Verwendung von OPFS) - Verständnis der Unterschiede zwischen Einzel- und Mehrbenutzerszenarien - Nutzung der Client Clocking-Funktion

HCL Nomad Web – Best Practices and Managing Multiuser Environmentspanagenda

Webinar Recording: https://www.panagenda.com/webinars/hcl-nomad-web-best-practices-and-managing-multiuser-environments/ HCL Nomad Web is heralded as the next generation of the HCL Notes client, offering numerous advantages such as eliminating the need for packaging, distribution, and installation. Nomad Web client upgrades will be installed “automatically” in the background. This significantly reduces the administrative footprint compared to traditional HCL Notes clients. However, troubleshooting issues in Nomad Web present unique challenges compared to the Notes client. Join Christoph and Marc as they demonstrate how to simplify the troubleshooting process in HCL Nomad Web, ensuring a smoother and more efficient user experience. In this webinar, we will explore effective strategies for diagnosing and resolving common problems in HCL Nomad Web, including - Accessing the console - Locating and interpreting log files - Accessing the data folder within the browser’s cache (using OPFS) - Understand the difference between single- and multi-user scenarios - Utilizing Client Clocking

UiPath Community Berlin: Orchestrator API, Swagger, and Test Manager APIUiPathCommunity

Join this UiPath Community Berlin meetup to explore the Orchestrator API, Swagger interface, and the Test Manager API. Learn how to leverage these tools to streamline automation, enhance testing, and integrate more efficiently with UiPath. Perfect for developers, testers, and automation enthusiasts! 📕 Agenda Welcome & Introductions Orchestrator API Overview Exploring the Swagger Interface Test Manager API Highlights Streamlining Automation & Testing with APIs (Demo) Q&A and Open Discussion Perfect for developers, testers, and automation enthusiasts! 👉 Join our UiPath Community Berlin chapter: https://community.uipath.com/berlin/ This session streamed live on April 29, 2025, 18:00 CET. Check out all our upcoming UiPath Community sessions at https://community.uipath.com/events/.

Big Data Analytics Quick Research Guide by Arthur MorganArthur Morgan

This is a Quick Research Guide (QRG). QRGs include the following: - A brief, high-level overview of the QRG topic. - A milestone timeline for the QRG topic. - Links to various free online resource materials to provide a deeper dive into the QRG topic. - Conclusion and a recommendation for at least two books available in the SJPL system on the QRG topic. QRGs planned for the series: - Artificial Intelligence QRG - Quantum Computing QRG - Big Data Analytics QRG - Spacecraft Guidance, Navigation & Control QRG (coming 2026) - UK Home Computing & The Birth of ARM QRG (coming 2027) Any questions or comments? - Please contact Arthur Morgan at [email protected]. 100% human made.

AI and Data Privacy in 2025: Global TrendsInData Labs

In this infographic, we explore how businesses can implement effective governance frameworks to address AI data privacy. Understanding it is crucial for developing effective strategies that ensure compliance, safeguard customer trust, and leverage AI responsibly. Equip yourself with insights that can drive informed decision-making and position your organization for success in the future of data privacy. This infographic contains: -AI and data privacy: Key findings -Statistics on AI data privacy in the today’s world -Tips on how to overcome data privacy challenges -Benefits of AI data security investments. Keep up-to-date on how AI is reshaping privacy standards and what this entails for both individuals and organizations.

Heap, Types of Heap, Insertion and DeletionJaydeep Kale

Technology Trends in 2025: AI and Big Data AnalyticsInData Labs

At InData Labs, we have been keeping an ear to the ground, looking out for AI-enabled digital transformation trends coming our way in 2025. Our report will provide a look into the technology landscape of the future, including: -Artificial Intelligence Market Overview -Strategies for AI Adoption in 2025 -Anticipated drivers of AI adoption and transformative technologies -Benefits of AI and Big data for your business -Tips on how to prepare your business for innovation -AI and data privacy: Strategies for securing data privacy in AI models, etc. Download your free copy nowand implement the key findings to improve your business.

Into The Box Conference Keynote Day 1 (ITB2025)Ortus Solutions, Corp

TrsLabs - Fintech Product & Business ConsultingTrs Labs

Hybrid Growth Mandate Model with TrsLabs Strategic Investments, Inorganic Growth, Business Model Pivoting are critical activities that business don't do/change everyday. In cases like this, it may benefit your business to choose a temporary external consultant. An unbiased plan driven by clearcut deliverables, market dynamics and without the influence of your internal office equations empower business leaders to make right choices. Getting things done within a budget within a timeframe is key to Growing Business - No matter whether you are a start-up or a big company Talk to us & Unlock the competitive advantage

Cybersecurity Identity and Access Solutions using Azure ADVICTOR MAESTRE RAMIREZ

Transcript: #StandardsGoals for 2025: Standards & certification roundup - Tec...BookNet Canada

Book industry standards are evolving rapidly. In the first part of this session, we’ll share an overview of key developments from 2024 and the early months of 2025. Then, BookNet’s resident standards expert, Tom Richardson, and CEO, Lauren Stewart, have a forward-looking conversation about what’s next. Link to recording, presentation slides, and accompanying resource: https://bnctechforum.ca/sessions/standardsgoals-for-2025-standards-certification-roundup/ Presented by BookNet Canada on May 6, 2025 with support from the Department of Canadian Heritage.

DevOpsDays Atlanta 2025 - Building 10x Development Organizations.pptxJustin Reock

Building 10x Organizations with Modern Productivity Metrics 10x developers may be a myth, but 10x organizations are very real, as proven by the influential study performed in the 1980s, ‘The Coding War Games.’ Right now, here in early 2025, we seem to be experiencing YAPP (Yet Another Productivity Philosophy), and that philosophy is converging on developer experience. It seems that with every new method we invent for the delivery of products, whether physical or virtual, we reinvent productivity philosophies to go alongside them. But which of these approaches actually work? DORA? SPACE? DevEx? What should we invest in and create urgency behind today, so that we don’t find ourselves having the same discussion again in a decade?

SAP Modernization: Maximizing the Value of Your SAP S/4HANA Migration.pdfPrecisely

Linux Professional Institute LPIC-1 Exam.pdfRHCSA Guru

Andrew Marnell: Transforming Business Strategy Through Data-Driven InsightsAndrew Marnell

Procurement Insights Cost To Value Guide.pptxJon Hansen

Cyber Awareness overview for 2025 month of securityriccardosl1

Generative Artificial Intelligence (GenAI) in BusinessDr. Tathagat Varma

2025-05-Q4-2024-Investor-Presentation.pptxSamuele Fogagnolo

Build Your Own Copilot & Agents For DevsBrian McKeiver

HCL Nomad Web – Best Practices und Verwaltung von Multiuser-Umgebungenpanagenda

HCL Nomad Web – Best Practices and Managing Multiuser Environmentspanagenda

UiPath Community Berlin: Orchestrator API, Swagger, and Test Manager APIUiPathCommunity

Big Data Analytics Quick Research Guide by Arthur MorganArthur Morgan

AI and Data Privacy in 2025: Global TrendsInData Labs

Heap, Types of Heap, Insertion and DeletionJaydeep Kale

Technology Trends in 2025: AI and Big Data AnalyticsInData Labs

Into The Box Conference Keynote Day 1 (ITB2025)Ortus Solutions, Corp

TrsLabs - Fintech Product & Business ConsultingTrs Labs

Cybersecurity Identity and Access Solutions using Azure ADVICTOR MAESTRE RAMIREZ

Transcript: #StandardsGoals for 2025: Standards & certification roundup - Tec...BookNet Canada

DevOpsDays Atlanta 2025 - Building 10x Development Organizations.pptxJustin Reock

SAP Modernization: Maximizing the Value of Your SAP S/4HANA Migration.pdfPrecisely

Linux Professional Institute LPIC-1 Exam.pdfRHCSA Guru

Andrew Marnell: Transforming Business Strategy Through Data-Driven InsightsAndrew Marnell

Procurement Insights Cost To Value Guide.pptxJon Hansen

Cyber Awareness overview for 2025 month of securityriccardosl1

Generative Artificial Intelligence (GenAI) in BusinessDr. Tathagat Varma

2025-05-Q4-2024-Investor-Presentation.pptxSamuele Fogagnolo

ORTC SVC SimulCast

1. ORTC SimulCast #niku_sushi Jxck

2. ● id: Jxck ● github: Jxck ● twitter: @jxck_ ● about: http://jxck.io ● blog: http://jxck.hatenablog.com ● podcast: http://mozaic.fm ● Love: music Jack

3. Q: Why ORTC ? A: long story... 3

4. 4 that’s all thank you !!

5. ORTC ≒ WebRTC 1.0 + SimulCast + MultiStream interop 5

6. Simulcast 6

7. SimulCast ? 7 Different Context !!

8. AVC Simulcast 8 ● re-encoding for each client capability, network ○ heavy resource ○ latecy at server

9. SVC Simulcast 9 ● SVC encode at client ○ multi layered video ○ router choose a layer

10. SVC 10

11. SVC(scalable video coding) 11 ● multi layered coding ○ 1-base layer ○ n-enhancement layer ● parameter ○ Temporal (frame rate) ○ Spatial (resolution) ○ Quality (SNR)

12. Temporal 12

13. Spatial 13

14. Quality 14

15. layer ● base layer ○ lowest quality for video conference ○ small size ○ error correction ● enhancement layer ○ merge with base layer ○ more size ○ fallback to base layer if lost ● layer choice ○ layer routing server choice ○ negotiation, bandwidth estimation etc 15

16. ORTC API 16

17. Over View 17

18. before / after PeerConnection 18 // before let peer = new PeerConnection(); // call these during singalling peer.addStream(); peer.onnegotiationneeded; peer.createOffer/Answer(); peer.setLocal/RemoteDescription(); peer.onicecandidate; peer.addIceCandidate(); // ALL API are on PeerConnection Class

19. before / after PeerConnection 19 // after let iceGatherer = new RTCIceGatherer(iceGatherOptions); let iceTransport = new RTCIceTransport(iceGatherer); let dtlsTransport = new RTCDtlsTransport(iceTransport); let rtpSender = new RTCRtpSender(mediaStreamTrack, dtlsTransport); let rtpReceiver = new RTCRtpReceiver(dtlsTransport); let sendCapas = RTCRtpSender.getCapabilities('video'); let recvCapas = RTCRtpReceiver.getCapabilities('video'); // exchange caps // ALL API are on each Classes

20. before / after DataChannel 20 // after let iceGatherer = new RTCIceGatherer(iceGatherOptions); let iceTransport = new RTCIceTransport(iceGatherer); let dtlsTransport = new RTCDtlsTransport(iceTransport); let sctpTransport = new RTCSctpTransport(dtlsTransport); let channel = new RTCDataChannel(sctpTransport); // before peerConnection.createDataChannel((channel) => { });

21. SVC 21 var encodings = [ { // 低解像度ベースレイヤ(1/2 フレームレート 1/2 解像度) encodingId: "0", resolutionScale: 2.0, framerateScale: 2.0 }, { // 拡張解像度ベースレイヤ(1/2 フレームレート 1/1 解像度) encodingId: "E0", resolutionScale: 1.0, framerateScale: 2.0 }, { // 低解像度ベースへの拡張レイヤ (1/1 レート, 1/2 解像度) encodingId: "1", dependencyEncodingIds: ["0"], resolutionScale: 2.0, framerateScale: 1.0 }, { // 拡張解像度ベースへの拡張レイヤ (1/1 レート, 1/1 解像度) encodingId: "E1", dependencyEncodingIds: ["E0"], resolutionScale: 1.0, framerateScale: 1.0 } ];

22. complicated ? 22 classes based on protocol stack http://www.slideshare.net/iwashi86/20140801-web-rtcmeetup3r3

23. WebRTC NV ≒ WebRTC.merge(ORTC) 23

24. more: http://jxck.hatenablog.com/entry/ortc-to-webrtcnv 24

25. have a nice web :) 25

26. Jack

ORTC SVC SimulCast

Recommended

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to ORTC SVC SimulCast (20)

More from Jxck Jxck (18)

Recently uploaded (20)

ORTC SVC SimulCast