Włącz tylną kamerę za pomocą HTML5
Pracuję nad projektem z MVC ASP.Net 4 HTML5 (domyślna przeglądarka to google-chrome v29.0.1547.57) mogę wchodzić w interakcje z tymi narzędziami i robić zdjęcia, ale tylko z przednim aparatem, Jak mogę włączyć tylny aparat? charakterystyka tabletu: Samsung Galaxy Tab 2 Mam nadzieję, że możesz mi pomóc
5 answers
Zobacz https://simpl.info/getusermedia/sources/ to pokazuje, jak można wybrać źródła za pomocą
MediaStreamTrack.getSources(gotSources);
Możesz następnie wybrać źródło i przekazać je jako opcjonalne do getUserMedia
var constraints = {
audio: {
optional: [{sourceId: audioSource}]
},
video: {
optional: [{sourceId: videoSource}]
}
};
navigator.getUserMedia(constraints, successCallback, errorCallback);
Jest teraz w pełni dostępny w stabilnej Chrome i mobile (od wersji 30)Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2015-03-30 14:50:12
Demo można znaleźć na https://webrtc.github.io/samples/src/content/devices/input-output / . pozwoli to na dostęp zarówno do przedniej, jak i tylnej kamery.
Wiele dem, które znajdziesz, opiera się na przestarzałej funkcji:
MediaStreamTrack.getSources()
Począwszy od Chrome 45 i FireFox 39, będziesz musiał użyć funkcji:
MediaDevices.enumerateDevices()
Przykład:
if (!navigator.mediaDevices || !navigator.mediaDevices.enumerateDevices) {
console.log("enumerateDevices() not supported.");
return;
}
// List cameras and microphones.
navigator.mediaDevices.enumerateDevices()
.then(function(devices) {
devices.forEach(function(device) {
console.log(device.kind + ": " + device.label +
" id = " + device.deviceId);
});
})
.catch(function(err) {
console.log(err.name + ": " + error.message);
});
Dalsza dokumentacja znajduje się tutaj: https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/enumerateDevices
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2016-02-18 11:39:15
W Chrome na moim Samsungu S8 mogę użyć "facingMode" = "środowisko" do robienia wideo Z "Tylnej Kamery". Domyślnym ustawieniem jest" użytkownik " (przednia kamera)
In TypeScript:
const video = document.getElementById("video");
const constraints = {
advanced: [{
facingMode: "environment"
}]
};
navigator.mediaDevices
.getUserMedia({
video: constraints
})
.then((stream) => {
video.src = window.URL.createObjectURL(stream);
video.play();
});
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2017-07-28 11:13:32
//----------------------------------------------------------------------
// Here we list all media devices, in order to choose between
// the front and the back camera.
// videoDevices[0] : Front Camera
// videoDevices[1] : Back Camera
// I used an array to save the devices ID
// which i get using devices.forEach()
// Then set the video resolution.
//----------------------------------------------------------------------
navigator.mediaDevices.enumerateDevices()
.then(devices => {
var videoDevices = [0,0];
var videoDeviceIndex = 0;
devices.forEach(function(device) {
console.log(device.kind + ": " + device.label +
" id = " + device.deviceId);
if (device.kind == "videoinput") {
videoDevices[videoDeviceIndex++] = device.deviceId;
}
});
var constraints = {width: { min: 1024, ideal: 1280, max: 1920 },
height: { min: 776, ideal: 720, max: 1080 },
deviceId: { exact: videoDevices[1] }
};
return navigator.mediaDevices.getUserMedia({ video: constraints });
})
.then(stream => {
if (window.webkitURL) {
video.src = window.webkitURL.createObjectURL(stream);
localMediaStream = stream;
} else if (video.mozSrcObject !== undefined) {
video.mozSrcObject = stream;
} else if (video.srcObject !== undefined) {
video.srcObject = stream;
} else {
video.src = stream;
}})
.catch(e => console.error(e));
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2017-03-20 08:32:10
Ostatni raz opracowałem ten kod, soo tutaj jest wersja, której używam: wywołujesz bezpośrednio funkcję whichCamera w kodzie i specefic który aparat "użytkownik"," środowisko "lub"komputer" 'jeśli jesteś uruchomiony w komputerze)
`//----------------------------------------------------------------------
// whichCamera(Type)
// For smartphone or tablet :
// Start the type={user,environment} camera.
// For computer it's simple :
// type = "computer".
//----------------------------------------------------------------------
var streamSrc, cameraType;
function whichCamera(type){
var cameraFacing;
cameraType = type;
if( type == "user")
cameraFacing = 0;
else if( type == "environment")
cameraFacing = 1;
else if( type == "computer"){
cameraFacing = 2;
}
console.log(type+" index : "+cameraFacing);
// Here we list all media devices, in order to choose between
// the front and the rear camera.
// videoDevices[0] : user Camera
// videoDevices[1] : environment Camera
// Then set the video resolution.
navigator.mediaDevices.enumerateDevices()
.then(devices => {
var videoDevices, videoDeviceIndex, constraints;
// Initialize the array wich will contain all video resources IDs.
// Most of devices have two video resources (Front & Rear Camera).
videoDevices = [0,0];
// Simple index to browse the videa resources array (videoDevices).
videoDeviceIndex = 0;
// devices.forEach(), this function will detect all media resources (Audio, Video) of the device
// where we run the application.
devices.forEach(function(device) {
console.log(device.kind + ": " + device.label +
" id = " + device.deviceId);
// If the kind of the media resource is video,
if (device.kind == "videoinput") {
// then we save it on the array videoDevices.
videoDevices[videoDeviceIndex++] = device.deviceId;
console.log(device.deviceId+" = "+videoDevices[videoDeviceIndex-1]);
}
});
console.log("Camera facing ="+cameraFacing+" ID = "+videoDevices[videoDeviceIndex-1]);
// Here we specified which camera we start,
// videoDevices[0] : Front Camera
// videoDevices[1] : Back Camera
if( cameraFacing != "computer"){
constraints = { deviceId: { exact: videoDevices[cameraFacing] }};
return navigator.mediaDevices.getUserMedia({ video:
constraints,
width: { min: 1280, ideal: 1600, max: 1920 },
height: { min: 720, ideal: 1200, max: 1080 }
}
);
}else
return navigator.mediaDevices.getUserMedia({ video: true });
})
// Then we retrieve the link to the video stream.
.then(stream => {
if (window.webkitURL) {
video.src = window.webkitURL.createObjectURL(stream);
localMediaStream = stream;
console.log(localMediaStream +" = "+ stream)
} else if (video.mozSrcObject !== undefined) {
video.mozSrcObject = stream;
console.log(video.mozSrcObject +" = "+ stream)
} else if (video.srcObject !== undefined) {
video.srcObject = stream;
console.log(video.srcObject +" = "+ stream)
} else {
video.src = stream;
console.log(video.src +" = "+ stream)
}
streamSrc = stream;
})
.catch(e => console.error(e));
}
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2017-07-16 15:53:38