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Audio 2021 opening

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WATCH RELATED VIDEO: The Opening - Official Audio

Twitter Spaces Opens Spark Social Audio Accelerator to Support Creators


Automatically starting the playback of audio or videos with audio tracks immediately upon page load can be an unwelcome surprise to users. While autoplay of media serves a useful purpose, it should be used carefully and only when needed. In order to give users control over this, browsers often provide various forms of autoplay blocking. In this guide, we'll cover autoplay functionality in the various media and Web Audio APIs, including a brief overview of how to use autoplay and how to work with browsers to handle autoplay blocking gracefully.

Media with an active audio track are considered to be audible , and autoplay blocking applies to them. Inaudible media are not affected by autoplay blocking. The term autoplay refers to any feature that causes audio to begin to play without the user specifically requesting that playback begin. This includes both the use of HTML attributes to autoplay media as well as the user of JavaScript code to start playback outside the context of handling user input.

That means that both of the following are considered autoplay behavior, and are therefore subject to the browser's autoplay blocking policy:. From the user's perspective, a web page or app that spontaneously starts making noise without warning can be jarring, inconvenient, or off-putting. Because of that, browsers generally only allow autoplay to occur successfully under specific circumstances.

As a general rule, you can assume that media will be allowed to autoplay only if at least one of the following is true:. Otherwise, the playback will likely be blocked. The exact situations that result in blocking, and the specifics of how sites become allowlisted vary from browser to browser, but the above are good guidelines to go by.

For details, see the auto-play policies for Google Chrome and WebKit. Note: Put another way, playback of any media that includes audio is generally blocked if the playback is programmatically initiated in a tab which has not yet had any user interaction.

Browsers may additionally choose to block under other circumstances. Now that we've covered what autoplay is and what can prevent autoplay from being allowed, we'll look at how your web site or app can automatically play media upon page load, how to detect when autoplay fails to occur, and tips for coping when autoplay is denied by the browser. This sets the autoplay property on the element to true , and when autoplay is true , the media will automatically begin to play as soon as possible after the following have occurred:.

If you rely on autoplay for anything important, or if autoplay failure will impact your app in any way, you will probably want to be able to tell when it autoplay didn't begin. Unfortunately, in the case of the autoplay attribute, recognizing whether or not autoplay successfully began is tricky. There's not an event triggered when autoplay fails.

Nor is there an exception thrown or a callback you can set up or even a flag on the media element that tells you if autoplay worked.

All you can really do is examine a few values and make an educated guess as to whether or not autoplay worked.

A better approach, if you're able to adjust the direction you look at things from, is to instead rely on knowing that playback of the media has successfully started, instead of when it fails to start. You can do this easily, by listening for the play event to be fired on the media element. The play event is sent both when the media is resumed after being paused and when autoplay occurs. That means that the first time the play event is fired, you know your media is being started for the first time after the page is opened.

After getting a reference to the video element from the Event object's target , the element's onplay handler is set to null.

This will prevent any future play events from being delivered to the handler. That could happen if the video is paused and resumed by the user or automatically by the browser when the document is in a background tab. At this point, your site or app can begin whatever it needs to do that relies upon the video having been started up. Note: This approach doesn't differentiate between autoplay and the user starting playback manually.

The term "autoplay" also refers to scenarios in which a script tries to trigger the playback of media that includes audio, outside the context of handling a user input event. This is done by calling the media element's play method. Note: It is strongly recommended that you use the autoplay attribute whenever possible, because support for autoplay preferences are more widespread for the autoplay attribute than for other means of playing media automatically.

It also lets the browser take responsibility for starting playback, letting it optimize the timing of that taking place. It's much easier to detect a failure to autoplay media when you use the play method to start it. When autoplay fails, you likely will want to offer a way for the user to manually tell the browser to ask the user to grant permission to play media.

The first thing we do with the result of play is make sure it's not undefined. We check for this because in earlier versions of the HTML specification, play didn't return a value.

Returning a promise to allow you to determine success or failure of the operation was added more recently. Checking for undefined prevents this code from failing with an error on older versions of web browsers. If the promise returned by play is resolved without error, the then clause is run and can begin whatever needs to be done when autoplay has begun.

We then add a catch handler to the promise. This looks at the error's name to see if it's NotAllowedError. This indicates that playback failed due to a permission issue, such as autoplay being denied. If that's the case, we should present a user interface to let the user manually start playback; that's handled here by a function showPlayButton.

If you want to start playing the video after the first interaction with the page, setInterval might be used to achieve this:. Doing so outside the context of handling a user input event is subject to autoplay rules. More content will come soon; autoplay blocking is still being worked on at Mozilla. If others have it already, they are welcome to pitch in with this section In addition to the browser-side management and control over autoplay functionality described above, a web server can also express its willingness to allow autoplay to function.

The HTTP Feature-Policy header's autoplay directive is used to control which domains, if any, can be used to autoplay media. By default, the autoplay feature policy is set to 'self' including the single quote characters , indicating that autoplay is permitted as they're hosted on the same domain as the document. These origins are separated by space characters. To use the Feature-Policy header to only allow media to autoplay from the document's origin :.

Adding Fullscreen API permission to the previous example results in a Feature-Policy header like the following if fullscreen access is allowed regardless of the domain; a domain restriction can be added as well as needed.

The HTTP header is:. Tips and recommended best practices to help you make the most of working with autoplay are offered here. A common use case for autoplay is to automatically begin to play a video clip that goes along with an article, an advertisement, or a preview of the page's main functionality.

The user has the option, however, of re-enabling the audio by clicking on the unmute button in the controls. Browsers may have preferences that control the way autoplay works, or how autoplay blocking is handled. Here, any such preferences that may be of special significance or importance to you as a web developer are listed. These include any that may aid in testing or debugging as well as any that could be set in a way that you need to be prepared to handle.

This is currently false by default except in nightly builds, where it's true by default. This Boolean preference, if true , allows browser extensions' background scripts to autoplay audio media. Setting this value to false disables this capability.

The default value is true. A Boolean preference which if true the default allows audio media which is currently muted to be automatically played. If this has been changed to false , media with an audio track will not be permitted to play even if muted. The default is false , except on Nightly where it is true.

An integer preference which specifies whether per-domain configuration for autoplay support by default is allowed 0 , blocked 1 , or prompt-on-use 2.

The default value is 0. A Boolean preference which controls whether or not detection of user gestures is allowed to override the setting of media. If media. A Boolean preference which indicates whether or not media playback is blocked when started on a background tab. The default value, true , means that even when otherwise available, autoplay won't take place until after a tab is brought to the foreground. This prevents the distracting situation in which a tab begins playing sound and the user can't find the tab among all their tabs and windows.

As a general rule, you can assume that media will be allowed to autoplay only if at least one of the following is true: The audio is muted or its volume is set to 0 The user has interacted with the site by clicking, tapping, pressing keys, etc. This sets the autoplay property on the element to true , and when autoplay is true , the media will automatically begin to play as soon as possible after the following have occurred: The page is allowed to use autoplay functionality The element has been created during page load Enough media has been received to begin playback and continue to play through to the end of the media without interruption, assuming there are no dramatic changes in network performance or bandwidth.

To use the Feature-Policy header to only allow media to autoplay from the document's origin : Feature-Policy: autoplay 'self'. Feature-Policy: autoplay 'self'; fullscreen.


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Automatically starting the playback of audio or videos with audio tracks immediately upon page load can be an unwelcome surprise to users. While autoplay of media serves a useful purpose, it should be used carefully and only when needed. In order to give users control over this, browsers often provide various forms of autoplay blocking. In this guide, we'll cover autoplay functionality in the various media and Web Audio APIs, including a brief overview of how to use autoplay and how to work with browsers to handle autoplay blocking gracefully. Media with an active audio track are considered to be audible , and autoplay blocking applies to them. Inaudible media are not affected by autoplay blocking. The term autoplay refers to any feature that causes audio to begin to play without the user specifically requesting that playback begin. This includes both the use of HTML attributes to autoplay media as well as the user of JavaScript code to start playback outside the context of handling user input. That means that both of the following are considered autoplay behavior, and are therefore subject to the browser's autoplay blocking policy:.

UN Secretary-General's address to the Opening of the General Debate of UNGA76

audio 2021 opening

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Autoplay guide for media and Web Audio APIs


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When given written words as input, they can generate extremely realistic text on virtually any topic. In addition, they also provide useful pretrained models that can be fine-tuned for a variety of difficult natural language processing NLP applications, including sentiment analysis, translation, information retrieval, inferences, and summarization, using only a few labels or examples e. There is an important limitation, however: These applications are mainly restricted to languages with very large text data sets suitable for training AI models. GSLM leverages recent breakthroughs in representation learning, allowing it to work directly from only raw audio signals, without any labels or text. It opens the door to a new era of textless NLP applications for potentially every language spoken on Earth—even those without significant text data sets. Previously, connecting an NLP application to speech inputs meant that researchers had to first train an automatic speech recognition ASR system, a resource-intensive operation that introduced errors, did a poor job of encoding casual linguistic interactions, and was available for just a handful of languages.

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YouTube announces new audio features aimed at making videos more accessible

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  1. Oighrig

    Very entertaining opinion