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默认开启摄像
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‎userMedia.html‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -78,7 +78,7 @@
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navigator.mediaDevices.enumerateDevices().then(gotDevices)
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// 开启摄像头
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openCamera.addEventListener("click", () => {
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function startOpenCamera() {
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if (window.stream) {
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window.stream.getTracks().forEach(track => {
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track.stop();
@@ -104,7 +104,7 @@
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} else {
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return alert('不支持访问用户媒体')
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}
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})
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}
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// 摄像机成功回调
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function gotStream(stream) {
@@ -166,6 +166,7 @@
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context1.drawImage(video, 50, 50); //将video对象内指定的区域捕捉绘制到画布上指定的区域,实现拍照。
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context1.drawImage(img, 50, 50);
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})
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startOpenCamera()
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</script>
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</body>
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