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The Great Big Beautiful Tomorrow
28 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Texte
Autres articles (61)
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Dépôt de média et thèmes par FTP
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Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Keeping control of your media in your hands
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Sur d’autres sites (11209)
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JSmpeg is not playing audio from websocket stream
5 juin 2023, par NikI am trying to stream RTSP to web browser using ffmpeg through web socket relay written in node js taken from https://github.com/phoboslab/jsmpeg , and on the browser i am using JSMpeg to display the RTSP stream, the video is playing fine, but audio is not playing,


The ffmpeg command :


ffmpeg -rtsp_transport tcp -i rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4 
 -f mpegts -c:v mpeg1video -c:a mp2 http://127.0.0.1:8081/stream_from_ffmpeg/


The node js web socket relay :


// Use the websocket-relay to serve a raw MPEG-TS over WebSockets. You can use
// ffmpeg to feed the relay. ffmpeg -> websocket-relay -> browser
// Example:
// node websocket-relay yoursecret 8081 8082
// ffmpeg -i <some input="input"> -f mpegts http://localhost:8081/yoursecret

var fs = require('fs'),
 http = require('http'),
 WebSocket = require('ws');

if (process.argv.length < 3) {
 console.log(
 'Usage: \n' +
 'node websocket-relay.js <secret> [ ]'
 );
 process.exit();
}

var STREAM_SECRET = process.argv[2],
 STREAM_PORT = process.argv[3] || 8081,
 WEBSOCKET_PORT = process.argv[4] || 8082,
 RECORD_STREAM = false;

// Websocket Server
var socketServer = new WebSocket.Server({port: WEBSOCKET_PORT, perMessageDeflate: false});
socketServer.connectionCount = 0;
socketServer.on('connection', function(socket, upgradeReq) {
 socketServer.connectionCount++;
 console.log(
 'New WebSocket Connection: ',
 (upgradeReq || socket.upgradeReq).socket.remoteAddress,
 (upgradeReq || socket.upgradeReq).headers['user-agent'],
 '('+socketServer.connectionCount+' total)'
 );
 socket.on('close', function(code, message){
 socketServer.connectionCount--;
 console.log(
 'Disconnected WebSocket ('+socketServer.connectionCount+' total)'
 );
 });
});
socketServer.broadcast = function(data) {
 socketServer.clients.forEach(function each(client) {
 if (client.readyState === WebSocket.OPEN) {
 client.send(data);
 }
 });
};

// HTTP Server to accept incoming MPEG-TS Stream from ffmpeg
var streamServer = http.createServer( function(request, response) {
 var params = request.url.substr(1).split('/');

 if (params[0] !== STREAM_SECRET) {
 console.log(
 'Failed Stream Connection: '+ request.socket.remoteAddress + ':' +
 request.socket.remotePort + ' - wrong secret.'
 );
 response.end();
 }

 response.connection.setTimeout(0);
 console.log(
 'Stream Connected: ' +
 request.socket.remoteAddress + ':' +
 request.socket.remotePort
 );
 request.on('data', function(data){
 socketServer.broadcast(data);
 if (request.socket.recording) {
 request.socket.recording.write(data);
 }
 });
 request.on('end',function(){
 console.log('close');
 if (request.socket.recording) {
 request.socket.recording.close();
 }
 });

 // Record the stream to a local file?
 if (RECORD_STREAM) {
 var path = 'recordings/' + Date.now() + '.ts';
 request.socket.recording = fs.createWriteStream(path);
 }
})
// Keep the socket open for streaming
streamServer.headersTimeout = 0;
streamServer.listen(STREAM_PORT);

console.log('Listening for incoming MPEG-TS Stream on http://127.0.0.1:'+STREAM_PORT+'/<secret>');
console.log('Awaiting WebSocket connections on ws://127.0.0.1:'+WEBSOCKET_PORT+'/');
</secret></secret></some>

The front end code




 
 
 
 
 <code class="echappe-js"><script src='http://stackoverflow.com/feeds/tag/jsmpeg.min.js'></script>
 
 
 
 
 
<script>&#xA; let url;&#xA; let player;&#xA; let canvas = document.getElementById("video-canvas");&#xA; let ipAddr = "127.0.0.1:8082";&#xA; window.onload = async() => {&#xA; url = `ws://${ipAddr}`;&#xA; player = new JSMpeg.Player(url, { canvas: canvas, });&#xA; };&#xA;&#xA; </script>




The above code works fine and plays the video, but no audio is playing
Things I tried :


Changed the audio context state inside the player object from suspended to running


player.audioOut.context.onstatechange = async () => {
 console.log("Event triggered by audio");

 if (player.audioOut.context === "suspended") {
 await player.audioOut.context.resume();
 }
}


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How can I rename a file from a txt file with Windows bat file ?
12 septembre 2022, par user1264599I have a batch script that renames a file to input.mkv so it can be processed by a string of other commands in the bat file with a final file called ProcessedVideo.mkv. I capture the OG file name using "dir *.mkv /b>OG_FileName.txt" before being renamed.


How can I rename the final processed mkv file to the name captured in the OG_FileName.txt and maybe add "_Added-Text.mkv" as the last part of my Batch Script ? (Adding text to the file name is not that important if it is too much trouble).


I really thought this would be easy but I'm defeated.


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Realtime video processing with javacv on Android
7 août 2014, par moonieI wish to do realtime video processing on Android using opencv/javacv. My basic approach can be summarized as follow :
onCreate(), generating a new JavaCameraView
mCameraView = new JavaCameraView(this, mCameraIndex);
mCameraView.setCvCameraViewListener(this);
setContentView(mCameraView);when the user clicks a button, a ffmpegframe recorder is created
try{
final long currentTimeMillis = System.currentTimeMillis();
final String appName=getString(R.string.app_name);
final String galleryPath=Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString();
final String albumPath=galleryPath+"/"+appName;
final String photoPath=albumPath+"/"+currentTimeMillis+".avi";
FFmpegFrameRecorder recorder=FFmpegFrameRecorder.createDefault(photoPath, 640, 360);
recorder.setFrameRate(30);
recorder.start();
}catch(FrameRecorder.Exception e){
e.printStackTrace();
}then for each CameraFrame, use the following code to process and save the frame
public Mat onCameraFrame(final CvCameraViewFrame inputFrame){
final Mat rgba = inputFrame.rgba();
//...apply some filters on rgba
if(mIsTakingVideo){
try{
recorder.record(MatToIplImage(rgba,640,320));
}catch(FrameRecorder.Exception {
e.printStackTrace();
}
}
return rgba;
}
public IplImage MatToIplImage(Mat m){
Bitmap bmp=Bitmap.createBitmap(m.width(), m.height(), Config.ARGB_8888);
Utils.matToBitmap(m, bmp);
IplImage image=IplImage.create(m.width(),m.height(),IPL_DEPTH_8U,1);
bmp.copyPixelsToBuffer(image.getByteBuffer());
return image;}When the user clicks the button again, the recorder is stopped and released. However the video I create is an empty video. Any idea why ?
EDIT :
The video was empty because the format avi is not supported on my test phone...
Now the video is not empty but it has the following errors- The recorded video has two split windows instead of just one window
- The color is very different from the object I recorded
- The play rate is too fast.
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