getusermedia

问题 I have been using getUserMedia() for WebRtc for a while now but since the latest update of browsers I have not been able to use this. On previous versions worked fine. Affected browsers' versions Firefox - 57.0.4 , Chrome - 63.0.3239.132 Example code: navigator.getUserMedia({ "audio": true, "video": false }, function (stream) { console.log(stream); localStream = stream; },logError); Also check this if anyone is getting this error in google sample code https://webrtc.github.io/samples/src

问题 I have been using getUserMedia() for WebRtc for a while now but since the latest update of browsers I have not been able to use this. On previous versions worked fine. Affected browsers' versions Firefox - 57.0.4 , Chrome - 63.0.3239.132 Example code: navigator.getUserMedia({ "audio": true, "video": false }, function (stream) { console.log(stream); localStream = stream; },logError); Also check this if anyone is getting this error in google sample code https://webrtc.github.io/samples/src

问题 I tried this and this, but the maximum resolution I can get is 640x480. The pictures taken by other windows apps by the same camera have the resolution of 1600x1200. Is there any limit for resolution in WebRTC? I cannot find any official documentation about that. 回答1: You can do it by using constraints and passing those to getUserMedia as shown in the links you provided. It's possible that your webcam only supports 640x480 for video and higher resolutions for still images (this is common).

问题 When I try to do the following: var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia; // now I try to invoke it with some parameters: getUserMedia(...) // not working! It throws an error "Illegal Invocation" in Chrome. But if I do: navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia; // now invoke it with the navigator navigator.getUserMedia(..) // Works I've tried searching a bit, and I

问题 I would like some advice on how best to get the microphone activity level of an audio MediaStreamTrack javascript object in Chrome/Canary. The MediaStreamTrack object is an audio track of the MediaStream returned by getUserMedia , as part of the WebRTC javascript API. 回答1: When microphone has audio the green bar up and down very nice: <script type="text/javascript"> navigator.webkitGetUserMedia({audio:true, video:true}, function(stream){ // audioContext = new webkitAudioContext(); deprecated

问题 I am trying to upload chunks of base64 to node js server and save those chunks into one file let chunks = []; app.post('/api', (req, res) => { let {blob} = req.body; //converting chunks of base64 to buffer chunks.push(Buffer.from(blob, 'base64')); res.json({gotit:true}) }); app.post('/finish', (req, res) => { let buf = Buffer.concat(chunks); fs.writeFile('finalvideo.webm', buf, (err) => { console.log('Ahh....', err) }); console.log('SAVED') res.json({save:true}) }); Problem with the above

问题 just need to get the url of canvas/image to insert the link to download <a href=IMAGE URL HERE" download="image">Save Image</a> I have the following code... <script> (function(){ var ctx=canvas.getContext('2d'); var localMediaStream=null; function sizeCanvas(){ setTimeout(function(){ canvas.width=video.videoWidth; canvas.height=video.videoHeight; img.height=video.videoHeight; img.width=video.videoWidth; },100);} function snapshot(){ ctx.drawImage(video,0,0); img.src=canvas.toDataURL('image

问题 Using the following code: function captureScreen(size) { navigator.webkitGetUserMedia({ audio: false, video: { mandatory: { chromeMediaSource: 'desktop', minWidth: size.width, maxWidth: size.width, minHeight: size.height, maxHeight: size.height, minFrameRate: 1, maxFrameRate: 1 } } }, gotStream, getUserMediaError); function gotStream(stream) { var video = document.createElement('video'); video.addEventListener('loadedmetadata',function(){ var canvas = document.createElement('canvas'); canvas

问题 I've built a Chrome extension that captures screen activity and microphone input and outputs a video file. Since chrome.desktopCapture can't record audio input alongside screen capture, I'm getting the mic in its own, separate stream. So: //get screen stream chrome.desktopCapture.chooseDesktopMedia(['screen'], null, (stream_id, opts) => { let constraints = {video: mandatory: { chromeMediaSource: 'desktop', chromeMediaSourceId: stream_id }}; navigator.mediaDevices.getUserMedia(constraints)

问题 I want to use HTML5 getusermedia to record audio, play back and save to server. I am trying with Google Nexus (Android 4+) and Google Chrome 29. Is it possible? When I try the codes I got from net, it asks permission to record using microphone and using the phone, I save a wav file. But no sound on playing this. The same site works from chromium browser in my PC. Am I doing anything wrong? or is it that audio recording is not actually working as it claims? Thanks 回答1: We now have Web Audio