RTSP is a simple signaling protocol which they cannot replace with anything for many years already, and it has to be admitted that they don't try really hard.
For example, we have an IP camera that supports RTSP. Anyone who has ever tested the traffic with a Sharkwire cable will tell you that first there comes DESCRIBE, then PLAY, and then the traffic begins to pour directly via RTP or wrapped in the TCP channel for instance.
In the first part, we have deployed a simple dynamic CDN for broadcasting WebRTC streams to two continents and have proved on the example of a countdown timer that the latency in this type of CDN is actually low.
In the second part, we have incorporated dedicated servers into the CDN for performing the task of transcoding in order to provide good broadcast quality to our viewers based on the devices they use and the channel quality. In this manner, all published streams in our CDN are available to all the viewers.
Now, assume that a company is starting to introduce its monetization strategy where a number of streams should be available for free and the rest on a subscription basis. Or, for example, webinars for in-house staff training are broadcasted simultaneously, but each subsidiary has a separate stream, and disclosing the sales techniques used in Southeast Asia to the managers from CIS countries is undesirable.
In the first part we have deployed a simple dynamic CDN for broadcasting WebRTC streams to two continents and have proved on the example of a countdown timer that the latency in this kind of CDN is actually low.
However, besides low latency, it is important to provide good broadcast quality to users. After all, this is what they are paying for. In real life the channels between Edge servers and users can differ in bandwidth capacity and quality. For example, we are publishing a 720p stream at 2 Mbps, the user is playing it on an Android phone using 3G connection in an unstable signal reception area and the 360p maximum resolution that provides smooth picture at 400 Mbps is 360p.
Having analyzed earlier the capacity of standard server configurations in Digital Ocean in terms of WebRTC streaming, we have noticed that one server can cover up to 2000 viewers. In real life, cases when one server is insufficient are not uncommon.
Assume gambling amateurs in Germany are watching real-time horse races in Australia. Given that horse races are not only a sports game but also imply big gains on condition that field bets are made at the right time, the video has to be delivered with lowest possible latency.
Another example: A global corporation, one of FCMG market leaders with subsidiaries in Europe, Russia and Southeast Asia, is organizing sales manager training webinars with live streaming from the headquarters in the Mediterranean. The viewers must be able to see and hear the presenter in real time.
Popular cloud hosting DigitalOcean has recently launched its new marketplace selling preconfigured images that can help to quickly deploy an application server. It’s much like AWS, but DO is for those already using this provider’s services. Let’s see how to deploy a simple server for WebRTC streaming with a DO account for a $10/month fee based on Flashphoner WebCallServer and how such a server can be of use.
When talking about "bad code" people almost certainly mean "complex code" among other popular problems. The thing about complexity is that it comes out of nowhere. One day you start your fairly simple project, the other day you find it in ruins. And no one knows how and when did it happen.
But, this ultimately happens for a reason! Code complexity enters your codebase in two possible ways: with big chunks and incremental additions. And people are bad at reviewing and finding both of them.
create-react-app and OG meta tags to /public/index.html. It should look like something like this:<!DOCTYPE html>
<html>
<head>
<meta charSet="utf-8"/>
<meta http-equiv="x-ua-compatible" content="ie=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"/>
<link rel="alternate" type="application/rss+xml" href="/rss.xml"/>
<title>Awesome App</title>
<meta property="og:title" content="Awesome app - the best app ever" />
<meta property="og:type" content="website" />
<meta property="og:image" content="https://picsum.photos/id/52/1200/600" />
<meta property="og:description" content="Describe stuff here." />
<meta property="og:url" content="yourawesomeapp.com" />
</head>
<body>
<noscript>This app works best with JavaScript enabled.</noscript>
<div id="root"></div>
</body>
</html>
With reference to Web Development, Front end development is mainly client-side development, which helps users to see and interact with the interface directly. This interface needs to be relevant to the context and in a layout that is easily perceivable by even the most naïve of the users. It should run uniformly on all platforms and devices. For anyone who is considering a career in Front-End Development, there is a specific set of skills to be mastered. Along with that, additional knowledge of the associated technologies that are used can be of great advantage.
The topmost skills for front end developers mainly depend on the scope of work that different organizations define for the role. However, these scope definitions vary a lot and hence need to be averaged out for defining a baseline. Let us start with the basic skill sets for now. These skills can be categorized into Technical and Non-Technical skills.
HTML/CSS/JavaScript: HTML or Hypertext Markup Language provides the main structure of a web page. It is more of a presentation language rather than a programming language. CSS or Cascading Style Sheets attributes to the styling and defines the look and formatting of the HTML page. CSS can be applied to any kind of XML document including SVG and XUL. It helps to create visually engaging web pages and user interfaces for mobile applications. JavaScript is a high- level, interpreted programming language which makes a webpage interactive. These are the 3 most essential requirements for anyone who is looking into a career as a Front-End Developer. More advanced the knowledge, the better. These provide the basic look and feel of the interface
Vepp is our new panel for managing servers and websites. At first, we just wanted to transform the interface of ISPmanager 5 but at the designing phase, we figured that (changing) the interface is not enough. We have to change the approach to modern user’s needs and tasks. As a matter of fact, it meant that we had to create a whole new product.
In the article, we’ll explain why we couldn’t make do with only cosmetic changes to ISPmanager 5 and show the result of the global overhaul.
As you have already know I love optional static typing. The thing is that sometimes it is not optional, but impossible. Because we have plenty of big untyped projects in Python's ecosystem.
Django and Django-Rest-Framework were two of them. Were. Because now they can be typed! Let me introduce TypedDjango organisation and stubs for django and drf.
This is going to be a concise tutorial and getting started guide.
