公司需求:
在線上瀏覽器調用攝像頭拍照上傳
本人實現 調用攝像頭拍照以下代碼 經測試 (Google Chrome 88.0.4324.182) 版本可用 各位可以試一試其他瀏覽器
參考代碼 https://www.jb51.net/article/193305.htm
發布到服務器只能支持HTTPS的 HTTP類型的會報錯 解決谷歌瀏覽器不支持HTTP的
在瀏覽器地址欄中輸入“chrome://flags/#unsafely-treat-insecure-origin-as-secure”,回車,如下圖,將該選項置為Enabled,在輸入框中輸入需要訪問的地址,多個地址使用“,”隔開,然后點擊右下角彈出的Relaunch按鈕,自動重啟瀏覽器之后就可以在添加的http地址下調用攝像頭和麥克風了。
以下是調用攝像頭代碼 直接用就可以
<template>
<div class="camera_outer">
<video id="videoCamera" :width="videoWidth" :height="videoHeight" autoplay></video>
<canvas style="display:none;" id="canvasCamera" :width="videoWidth" :height="videoHeight"></canvas>
<div v-if="imgSrc" class="img_bg_camera">
<img :src="imgSrc" alt="" class="tx_img">
</div>
<div>
<button @click="getCompetence()">打開攝像頭</button>
<button @click="stopNavigator()">關閉攝像頭</button>
<button @click="setImage()">拍照</button>
</div>
</div>
</template>
<script>
export default {
data() {
return {
videoWidth: 540,
videoHeight: 410,
imgSrc: '',
thisCancas: null,
thisContext: null,
thisVideo: null,
validTip: '驗證中'
}
},
computed: {},
methods: {
/*調用權限*/
getCompetence() {
var _this = this
this.thisCancas = document.getElementById('canvasCamera')
this.thisContext = this.thisCancas.getContext('2d')
this.thisVideo = document.getElementById('videoCamera')
// 舊版本瀏覽器可能根本不支持mediaDevices,我們首先設置一個空對象
if (navigator.mediaDevices === undefined) {
navigator.mediaDevices = {}
}
// 一些瀏覽器實現了部分mediaDevices,我們不能只分配一個對象
// 使用getUserMedia,因為它會覆蓋現有的屬性。
// 這里,如果缺少getUserMedia屬性,就添加它。
if (navigator.mediaDevices.getUserMedia === undefined) {
navigator.mediaDevices.getUserMedia = function (constraints) {
// 首先獲取現存的getUserMedia(如果存在)
var getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.getUserMedia
// 有些瀏覽器不支持,會返回錯誤信息
// 保持接口一致
if (!getUserMedia) {
return Promise.reject(new Error('getUserMedia is not implemented in this browser'))
}
// 否則,使用Promise將調用包裝到舊的navigator.getUserMedia
return new Promise(function (resolve, reject) {
getUserMedia.call(navigator, constraints, resolve, reject)
})
}
}
var constraints = {
audio: false,
video: {width: this.videoWidth, height: this.videoHeight, transform: 'scaleX(-1)'}
}
navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
// 舊的瀏覽器可能沒有srcObject
if ('srcObject' in _this.thisVideo) {
_this.thisVideo.srcObject = stream
} else {
// 避免在新的瀏覽器中使用它,因為它正在被棄用。
_this.thisVideo.src = window.URL.createObjectURL(stream)
}
_this.thisVideo.onloadedmetadata = function () {
_this.thisVideo.play()
}
}).catch(err => {
console.log(err)
})
},
/*繪制圖片*/
setImage() {
var _this = this
// 點擊,canvas畫圖
_this.thisContext.drawImage(_this.thisVideo, 0, 0, _this.videoWidth, _this.videoHeight)
// 獲取圖片base64鏈接
var image = this.thisCancas.toDataURL('image/png')
_this.imgSrc = image
this.$emit('refreshDataList', this.imgSrc)
},
/*base64轉文件*/
dataURLtoFile(dataurl, filename) {
var arr = dataurl.split(',')
var mime = arr[0].match(/:(.*?);/)[1]
var bstr = atob(arr[1])
var n = bstr.length
var u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
return new File([u8arr], filename, {type: mime})
},
/*關閉攝像頭*/
stopNavigator() {
this.thisVideo.srcObject.getTracks()[0].stop()
}
},
mounted() {
this.getCompetence()
},
beforeDestroy() {
this.stopNavigator()
}
}
</script>
<style lang="scss" scoped>
.camera_outer {
position: relative;
overflow: hidden;
background-size: 100%;
video, canvas, .tx_img {
-moz-transform: scaleX(-1);
-webkit-transform: scaleX(-1);
-o-transform: scaleX(-1);
transform: scaleX(-1);
}
.btn_camera {
position: absolute;
bottom: 4px;
left: 0;
right: 0;
height: 50px;
background-color: rgba(0, 0, 0, 0.3);
line-height: 50px;
text-align: center;
color: #ffffff;
}
.bg_r_img {
position: absolute;
bottom: 0;
left: 0;
right: 0;
top: 0;
}
.img_bg_camera {
position: absolute;
bottom: 0;
left: 0;
right: 0;
top: 0;
img {
width: 100%;
height: 100%;
}
.img_btn_camera {
position: absolute;
bottom: 0;
left: 0;
right: 0;
height: 50px;
line-height: 50px;
text-align: center;
background-color: rgba(0, 0, 0, 0.3);
color: #ffffff;
.loding_img {
width: 50px;
height: 50px;
}
}
}
}
</style>