I have successfully used webrtc to bind a local camera to a html element.
I have more than one camera connected to my pc.
How can I use javascript to find out the DeviceID of the camera, that is now in use?
2022 Answer
(Not sure if the previous answer was correct in its time, but here's what I did to solve the same question.)
I assume the HTML element you bound the camera to was a video element. Here's how I got the the DeviceID from it.
const video = document.querySelector("#videoElement");
const stream = video?.srcObject;
const videoTrack = stream?.getTracks()?.find(track => track.kind === "video");
const videoID = videoTrack?.getSettings().deviceId;
Get the tracks from the MediaStream you get from getUserMedia, look at the label property.
See https://github.com/webrtc/samples/blob/master/src/content/getusermedia/gum/js/main.js#L23 for a sample.
Related
Instead of creating a Windows built-in camera UI (CameraCaptureUI) or using a custom MediaCapture control and capture picture I want to open any Camera App downloaded in the device to capture an image and get the result.
I have used
string uriToLaunch = "microsoft.windows.camera:";
var uri = new Uri(uriToLaunch);
var success = await Windows.System.Launcher.LaunchUriAsync(uri);
But this just opens the camera app, I need to get the result file back to the app and save it.
Is there a way to do this?
The method you are using:
var success = await Windows.System.Launcher.LaunchUriAsync(uri);
just opens the default camera, nothing more, the result is a boolean with information if the application has been opened successfully, nothing more.
With CameraCaptureUI you don't need to create camera - this seems to be designed for the task like you have described. With lines:
var captureUI = new CameraCaptureUI();
captureUI.PhotoSettings.Format = CameraCaptureUIPhotoFormat.Jpeg;
captureUI.PhotoSettings.CroppedSizeInPixels = new Size(200, 200);
var photo = await captureUI.CaptureFileAsync(CameraCaptureUIMode.Photo);
you just launch the camera app and your app waits for the photo, which you can process further/save.
If you don't want to use it or implement own camera capture, you can think of sharing a picture taken by other app. This is described well at app-to-app communication at MSDN. In this case user will have to click Share button and choose your app as a target. That will invoke OnShareTargetActivated event where you can process the received content.
I used to call Google Translate TTS to download an audio file using this url:
http://translate.google.com/translate_tts?tl=en&q=Hello+world!
However Google changed the way that works and therefore I can no longer download the audio files.
I've signed up for a free trial for Google Translate API V2, but can't find how to get the TTS audio files.
Any idea?
You can use that link without captcha..
https://translate.google.com/translate_tts?ie=UTF-8&tl=tr-TR&client=tw-ob&q=Batsın+bu+dünya+bitsin+bu+rüya
I stumbled across this thread and wanted to give my take on it, with reference to #Alexandre Andrade, mainly because he didn't submit any code.
I did this in a react app, but the same procedure should works for a vanilla web project.
I did add the meta tag to my head public/index.html,
<head>
...
<meta name="referrer" content="no-referrer">
...
</head>
Then added the audio tag in my component:
Javascript:
const playTTS = (text, lang) => {
// Get the audio element
const audioEl = document.getElementById('tts-audio');
const url= `https://translate.google.com/translate_tts?ie=UTF-8&tl=${lang}&client=tw-ob&q=${text}`;
// add the sound to the audio element
audioEl.src = url;
//For auto playing the sound
audioEl.play();
};
html
...
<audio controls id="tts-audio"/>
...
Then it's just a matter of hooking the function up to some of your life cycle methods. Since I wrote my react code in react hooks, I added the function call in one of my hooks to get it initialized when the component was loaded. (this would be in the componentDidMount() function otherwise).
Hope this helps anyone out!
try this link for English:
https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=en&q=Hello+World
For Chinese (Puthonghua)
https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=zh-CN&q=世界+你好
Text-to-speech was always an 'unofficial' API which is now captcha-protected to prevent abuse. It was never advertised as part of the Translate API, and currently there is no TTS functionality in the Translate V2 API, paid or otherwise.
There is some more background on the following groups thread which had been ongoing for some time.
Here's to those who have desperately been trying to play Google TTS as an audio in HTML: let me save you a couple of hours of time and tell you how to do it.
Let's say we have this link:
https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=en&q=I+love+coffee
If you try to play this audio given the link and using <audio>, <iframe>, using third-party libraries or playing it with Javascript...
var audio = new Audio('https://translate.google.com/translate_tts...');
audio.play();
...then you'll soon find out that none of the aforementioned ways work as Error 404 is being thrown.
Solution
Apparently, the only possible way to play this TTS generic audio is to utilise <embed> tag wrapped into a custom <iframe> and giving the link a unique version number (it is important, as caching by browsers prevents the audio from playing for some reason).
Here is the solution for our example: (assuming you have an iframe#ttsiframe)
function playTTS(lang,sentence) {
//get the iframe
var iFrame = document.getElementById('ttsiframe');
//remove its sandbox property
iFrame.removeAttribute('sandbox');
//this is your reference variable for the iframe body and head tag
var iFrameBody;
//get the body
if (iFrame.contentDocument) { // FF
iFrameBody = iFrame.contentDocument.getElementsByTagName('body')[0];
iFrameHead = iFrame.contentDocument.getElementsByTagName('head')[0];
}
else if (iFrame.contentWindow) { // IE
iFrameBody = iFrame.contentWindow.document.getElementsByTagName('body')[0];
iFrameHead = iFrame.contentWindow.document.getElementsByTagName('head')[0];
}
else {
iFrameBody = iFrame.contentDocument.body;
iFrameHead = iFrame.contentDocument.head;
}
//generate link to Google Translate TTS using arguments (pay attention to random version number at the end)
var link = 'https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=' + lang + '&q=' + sentence.replace(/ /g,'+').replace(/[.]/g,'') + '&rd=' + getRandomInt(0,50000000);
//add embed element with our link
iFrameBody.innerHTML = '<embed src="' + link + '" id="TTS">';
//isolate iframe
iFrame.setAttribute('sandbox','');
}
you can simply use the link:
Text to Speech
I am attempting to visualize audio coming out of an element on a webpage. The source for that element is a WebRTC stream connecting to an Asterisk call via sip.js. The audio works as intended.
However, when I attempt to get the frequency data using web audio api, it returns an array of all 0's, even though the audio is working. This seems be a problem with createMediaElementSource. If I call getUserMedia and use createMediaStreamSource to connect my microphone to the input, I indeed get the frequency data returned.
This was attempted in both Chrome 40.0 and Firefox 31.4. In my search I found similar errors with Android Chrome but my versions of desktop Chrome and Firefox seem like they should be functioning correctly. So far I have a feeling that the error may be due to the audio player getting it's audio from another AudioContext in sip.js, or something having to do with CORS. All of the demos that I have tried work correctly, but only use createMediaStreamSource to get mic audio, or use createMediaElementSource to play a file (rather than streaming to an element).
My Code:
var context = new (window.AudioContext || window.webkitAudioContext)();
var analyser = context.createAnalyser();
analyser.fftSize = 64;
analyser.minDecibels = -90;
analyser.maxDecibels = -10;
analyser.smoothingTimeConstant = 0.85;
var frequencyData = new Uint8Array(analyser.frequencyBinCount);
var visualisation = $("#visualisation");
var barSpacingPercent = 100 / analyser.frequencyBinCount;
for (var i = 0; i < analyser.frequencyBinCount; i++) {
$("<div/>").css("left", i * barSpacingPercent + "%").appendTo(visualisation);
}
var bars = $("#visualisation > div");
function update() {
window.requestAnimationFrame(update);
analyser.getByteFrequencyData(frequencyData);
bars.each(function (index, bar) {
bar.style.height = frequencyData[index] + 'px';
console.debug(frequencyData[index]);
});
};
$("audio").bind('canplay', function() {
source = context.createMediaElementSource(this);
source.connect(analyser);
update();
});
Any help is greatly appreciated.
Chrome doesn't support WebAudio processing of RTCPeerConnection output streams (remote streams); see this question. Their bug is here.
Edit: they now support this in Chrome 50
See the test code for firefox about to land as part of this bug:
Bug 1081819. This bug will add webaudio input to RTCPeerConnections in Firefox; we've had working WebAudio processing of output MediaStreams for some time. The test code there tests both sides; note it depends a lot on the test framework, so just use it as a guide on hooking to webaudio.
I'm using video.js (4.1.0), and would like to return to the ready-to-start state at the end of the video. I don't see how to do this.
If I do
myPlayer.on("ended", function(){
});
and load the poster frame in there, using myPlayer.posterImage.show(); it covers the entire video object, even if a user starts playing the video again.
If, at the end, I do this:
this.pause();
this.currentTime(0);
it has the video paused at the beginning, rather than the ready state with poster frame.
Any thoughts on how I can accomplish this?
The poster image should disappear again when playback restarts - do you have a link where it does not? It does in this fiddle, where the posterImage and bigPlayButton are shown and currentTime is set to 0.
var vid = videojs("myVideo");
vid.on("ended", function(){
vid.posterImage.show();
vid.bigPlayButton.show();
vid.currentTime(0);
})
I am trying to make a flash banner in CS4 with AS3.
In this banner I have to embed youtube videos.
My problem is.. after the video loaded I cant have/see usual controls (fullscreen, pause, stop, etc) on the video.. and the video has the autoplay by default.
I am using this code:
Security.allowDomain("*");
Security.allowDomain("www.youtube.com");
Security.allowDomain("youtube.com");
Security.allowDomain("s.ytimg.com");
Security.allowDomain("i.ytimg.com");
var my_player1:Object;
var my_loader1:Loader = new Loader();
my_loader1.load(new URLRequest("http://www.youtube.com/apiplayer?version=3"));
my_loader1.contentLoaderInfo.addEventListener(Event.INIT, onLoaderInit);
function onLoaderInit(e:Event):void{
addChild(my_loader1);
my_player1 = my_loader1.content;
my_player1.addEventListener("onReady", onPlayerReady);
}
function onPlayerReady(e:Event):void{
my_player1.setSize(200,100);
/////////////////////////////////
//this example is with parameter//
//my_player1.loadVideoByUrl("http://www.youtube.com/v/ID-YOUTUBE?autohide=1&autoplay=0&fs=1&rel=0",0);
//////////////////////////////////
// this one is only the video id//
my_player1.loadVideoByUrl("http://www.youtube.com/v/ID-YOUTUBE",0);
}
I was trying to pass the parameter in the url to try but seems to be is not working.
I was checking too the google API for AS3 (http://code.google.com/apis/youtube/flash_api_reference.html) but honestly I dont find the way to implement that I need.
Whats is the way to see this controls in the video??
Thank you :)
I was trying different thing and I found a partial solution that i want to share with:
Security.allowDomain("www.youtube.com");
Security.allowDomain("youtube.com");
Security.allowDomain("s.ytimg.com");
Security.allowDomain("i.ytimg.com");
Security.allowDomain("s.youtube.com");
var my_player1:Object;
var my_loader1:Loader = new Loader();
//before I used that:
//my_loader1.load(new URLRequest("http://www.youtube.com/apiplayer?version=3"));
//Now is use this:
my_loader1.load(new URLRequest("http://www.youtube.com/v/ID_VIDEO?version=3));
my_loader1.contentLoaderInfo.addEventListener(Event.INIT, onLoaderInit);
function onLoaderInit(e:Event):void{
addChild(my_loader1);
my_player1 = my_loader1.content;
my_player1.addEventListener("onReady", onPlayerReady);
}
function onPlayerReady(e:Event):void{
my_player1.setSize(200,100);
my_player1.loadVideoByUrl("http://www.youtube.com/v/ID_VIDEO",0);
}
Basically Instead of use the "Loading the chromeless player" I use the "Loading the embedded player"
My problem now is How I can modify for example the size of the controls bar.. because is taking 35px height and I want to reduce it
Thank