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diff --git a/files/pt-pt/web/api/media_streams_api/index.html b/files/pt-pt/web/api/media_streams_api/index.html new file mode 100644 index 0000000000..52d9d666c9 --- /dev/null +++ b/files/pt-pt/web/api/media_streams_api/index.html @@ -0,0 +1,212 @@ +--- +title: API de Captura de Transmissões de Multimédia (Media Streams) +slug: Web/API/Media_Streams_API +tags: + - API + - API de Transmissão de Multimédia + - Audio + - Avançado + - Guía + - Introdução + - Media + - Multimedia + - Video +translation_of: Web/API/Media_Streams_API +original_slug: Web/API/API_transmissoes_multimedia +--- +<div>{{DefaultAPISidebar("Media Capture and Streams")}}</div> + +<p>A API de <em><strong>Media Capture and Streams</strong></em>, muitas vezes chamada de <em>Media Stream API</em> ou <em>Stream API</em>, é uma API relacionada com <a href="/pt-PT/docs/Web/API/API_WebRTC" title="/en-US/docs/WebRTC">WebRTC</a> que suporta transmissões de dados de áudio ou vídeo, os métodos para trabalhar com eles, as restrições associadas com o tipo de dados, as devoluções de retorno de sucesso e erro quando utilizar os dados de forma assíncrona, e os eventos que foram ativados durante o processo.</p> + +<h2 id="Conceitos_básicos">Conceitos básicos</h2> + +<p>The API is based on the manipulation of a {{domxref("MediaStream")}} object representing a flux of audio- or video-related data. See an example in <a href="/docs/Web/API/API_WebRTC/Tirar_fotografias" title="/en-US/docs/WebRTC/taking_webcam_photos#Get_the_video">Get the video</a>.</p> + +<p>A <code>MediaStream</code> consists of zero or more {{domxref("MediaStreamTrack")}} objects, representing various audio or video <strong>tracks</strong>. Each <code>MediaStreamTrack</code> may have one or more <strong>channels</strong>. The channel represents the smallest unit of a media stream, such as an audio signal associated with a given speaker, like <em>left</em> or <em>right</em> in a stereo audio track.</p> + +<p><code>MediaStream</code> objects have a single <strong>input</strong> and a single <strong>output</strong>. A <code>MediaStream</code> object generated by {{domxref("MediaDevices.getUserMedia", "getUserMedia()")}} is called <em>local</em>, and has as its source input one of the user's cameras or microphones. A non-local <code>MediaStream</code> may be representing to a media element, like {{HTMLElement("video")}} or {{HTMLElement("audio")}}, a stream originating over the network, and obtained via the WebRTC {{domxref("RTCPeerConnection")}} API, or a stream created using the <a href="/en-US/docs/Web_Audio_API" title="/en-US/docs/Web_Audio_API">Web Audio API</a> {{domxref("MediaStreamAudioSourceNode")}}. The output of the <code>MediaStream</code> object is linked to a <strong>consumer</strong>. It can be a media elements, like {{HTMLElement("audio")}} or {{HTMLElement("video")}}, the WebRTC {{domxref("RTCPeerConnection")}} API or a <a href="/en-US/docs/Web_Audio_API" title="/en-US/docs/Web_Audio_API">Web Audio API</a> {{domxref("MediaStreamAudioDestinationNode")}}.</p> + +<h2 id="Referência">Referência</h2> + +<div class="index"> +<ul> + <li>{{event("addtrack")}} (event)</li> + <li>{{domxref("AudioStreamTrack")}}</li> + <li>{{domxref("BlobEvent")}}</li> + <li>{{event("ended")}} (event)</li> + <li>{{domxref("MediaStream")}}</li> + <li>{{domxref("MediaStreamTrack")}}</li> + <li>{{domxref("MediaStreamTrackEvent")}}</li> + <li>{{domxref("MediaTrackCapabilities")}}</li> + <li>{{domxref("MediaTrackConstraints")}}</li> + <li>{{domxref("MediaTrackSettings")}}</li> + <li>{{domxref("MediaTrackSupportedConstraints")}}</li> + <li>{{event("muted")}} (event)</li> + <li>{{domxref("NavigatorUserMedia")}}</li> + <li>{{domxref("NavigatorUserMediaError")}}</li> + <li>{{event("overconstrained")}} (event)</li> + <li>{{event("removetrack")}} (event)</li> + <li>{{event("started")}} (event)</li> + <li>{{event("unmuted")}} (event)</li> + <li>{{domxref("URL")}}</li> + <li>{{domxref("VideoStreamTrack")}}</li> +</ul> +</div> + +<h2 id="Guias_e_tutoriais">Guias e tutoriais</h2> + +<p>{{LandingPageListSubpages}}</p> + +<h2 id="Compatibilidade_de_navegador">Compatibilidade de navegador</h2> + +<p>{{ CompatibilityTable }} </p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Funcionalidade</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Edge</th> + <th>Internet Explorer</th> + <th>Opera </th> + <th>Safari (WebKit)</th> + </tr> + <tr> + <td>Stream API </td> + <td>21{{ property_prefix("webkit") }} </td> + <td>Nightly 18{{ property_prefix("moz") }} </td> + <td>{{ CompatVersionUnknown }}</td> + <td>{{ CompatUnknown }} </td> + <td>12</td> + <td>{{ CompatUnknown }} </td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Funcionalidade</th> + <th>Android</th> + <th>Edge</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Phone</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>API de emissão</td> + <td>{{ CompatNo }} </td> + <td>{{CompatVersionUnknown}}</td> + <td>{{ CompatUnknown }}</td> + <td>{{ CompatUnknown }} </td> + <td>{{ CompatNo }} </td> + <td>{{ CompatNo }} </td> + </tr> + </tbody> +</table> +</div> + +<p> </p> + +<p>Currently using WebRTC for accessing the camera is supported in Chrome, Opera and Firefox Nightly 18. Enabling WebRTC in Firefox Nightly requires you to set a flag in the configuration:</p> + +<ul> + <li>Type "about:config" in the address bar and say yes that you want to make changes</li> + <li>Find the "media.navigator.enabled" entry and set it to true</li> +</ul> + +<h2 id="Consulte_também">Consulte também</h2> + +<ul> + <li><a href="/pt-PT/docs/Web/API/API_WebRTC" title="/en-US/docs/WebRTC">WebRTC</a> - a página introdutória para a API</li> + <li>{{domxref("mediaDevices.getUserMedia()")}}</li> + <li><a href="/pt-PT/docs/Web/API/API_WebRTC/Tirar_fotografias">Tirar fotografias com a câmara da <em>Web</em></a>: tutorial sobre como utilizar <code>getUserMedia()</code>.</li> +</ul> + +<div id="SL_balloon_obj" style="display: block;"> +<div class="SL_ImTranslatorLogo" id="SL_button" style="background: rgba(0, 0, 0, 0) repeat scroll 0% 0%; opacity: 0; display: block; left: -8px; top: -25px; transition: visibility 2s ease 0s, opacity 2s linear 0s;"> </div> + +<div 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