Created
November 29, 2020 21:53
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Exemplo de código que tira foto da webcam
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| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <div id="screenshot"> | |
| <video autoplay></video> | |
| <img src="" download="new-image-name.webp"> | |
| <canvas style="display:none;"></canvas> | |
| <p><button class="capture-button">Capture video</button> | |
| </p> | |
| <p><button id="screenshot-button" disabled="">Take screenshot</button></p> | |
| <p>Para enviar a imagem, extrair o conteúdo de img.src (base64): inspecione para entender.</p> | |
| </div> | |
| <script> | |
| // verifica se navegador surpota mediaDevices | |
| function hasGetUserMedia() { | |
| return !!(navigator.mediaDevices && navigator.mediaDevices.getUserMedia); | |
| } | |
| if (hasGetUserMedia()) { | |
| // Good to go! | |
| const constraints = { | |
| video: true, | |
| }; | |
| const captureVideoButton = document.querySelector( | |
| "#screenshot .capture-button" | |
| ); | |
| const screenshotButton = document.querySelector("#screenshot-button"); | |
| const img = document.querySelector("#screenshot img"); | |
| const video = document.querySelector("#screenshot video"); | |
| const canvas = document.createElement("canvas"); | |
| captureVideoButton.onclick = function () { | |
| navigator.mediaDevices | |
| .getUserMedia(constraints) | |
| .then(handleSuccess) | |
| .catch(handleError); | |
| }; | |
| screenshotButton.onclick = video.onclick = function () { | |
| canvas.width = video.videoWidth; | |
| canvas.height = video.videoHeight; | |
| canvas.getContext("2d").drawImage(video, 0, 0); | |
| // Other browsers will fall back to image/png | |
| img.src = canvas.toDataURL("image/webp"); | |
| }; | |
| function handleSuccess(stream) { | |
| screenshotButton.disabled = false; | |
| video.srcObject = stream; | |
| } | |
| } else { | |
| alert("getUserMedia() is not supported by your browser"); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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