Recherche avancée

Médias (1)

Mot : - Tags -/lev manovitch

Autres articles (67)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (6335)

  • Anomalie #3816 (Nouveau) : Compatiblité avec PHP 7.0.9 et 5.6.24 et les fonctions "expected to be ...

    10 août 2016

    Suite à http://forum.spip.net/fr_264848.html#forum264908

    Apparemment SPIP et PHP 7.0.9 génère une page blanche.

    D’après Tatu, il faudrait modifier le paramètre de la fonction f_queue() à la ligne 246 du fichier "spip/ecrire/inc/pipelines.php"

    Ainsi la fonction :
    function f_queue(&$texte)
    Devient :
    function f_queue($texte)

    D’après Luc, cela pourrait venir de https://bugs.php.net/bug.php?id=72698

    Si c’est le cas, il faudrait faire une revue du code et chercher les appels de type &$

  • Recording voice using HTML5 and processing it with ffmpeg

    22 mars 2015, par user3789242

    I need to use ffmpeg in my javascript/HTML5 project which allows the user to select the format he wants the audio to open with.I don’t know anything about ffmpeg and I’ve been doing lots of research I don’t know how to use it in my project. I found an example https://github.com/sopel39/audioconverter.js but the problem how can I install the ffmpeg.js which is 8 mg to m project. please if someone can help me I’ll be very thankfull
    here is my full code :

    the javascript page :

    // variables
    
var leftchannel = [];
    
var rightchannel = [];
    
var recorder = null;
    
var recording = false;
    
var recordingLength = 0;
    
var volume = null;
    
var audioInput = null;
    
var sampleRate = 44100;
    
var audioContext = null;
    
var context = null;
    
var outputString;
    

    

    

    
if (!navigator.getUserMedia)
    
navigator.getUserMedia = navigator.getUserMedia ||
    
                         navigator.webkitGetUserMedia ||
    
                         navigator.mozGetUserMedia || 
    
                         navigator.msGetUserMedia;
    

    
if (navigator.getUserMedia){
    
navigator.getUserMedia({audio:true}, success, function(e) {
    
alert('Error capturing audio.');
    
});
    
} else alert('getUserMedia not supported in this browser.');
    

    

    

    
function getVal(value)
    
  {
    

    
// if R is pressed, we start recording
    
if ( value == "record"){
    
    recording = true;
    
    // reset the buffers for the new recording
    
    leftchannel.length = rightchannel.length = 0;
    
    recordingLength = 0;
    
    document.getElementById('output').innerHTML="Recording now...";
    

    
 // if S is pressed, we stop the recording and package the WAV file
    
 } else if ( value == "stop" ){
    

    
    // we stop recording
    
    recording = false;
    
    document.getElementById('output').innerHTML="Building wav file...";
    

    
    // we flat the left and right channels down
    
    var leftBuffer = mergeBuffers ( leftchannel, recordingLength );
    
    var rightBuffer = mergeBuffers ( rightchannel, recordingLength );
    
    // we interleave both channels together
    
    var interleaved = interleave ( leftBuffer, rightBuffer );
    

    

    

    
    var buffer = new ArrayBuffer(44 + interleaved.length * 2);
    
    var view = new DataView(buffer);
    

    
    // RIFF chunk descriptor
    
    writeUTFBytes(view, 0, 'RIFF');
    
    view.setUint32(4, 44 + interleaved.length * 2, true);
    
    writeUTFBytes(view, 8, 'WAVE');
    
    // FMT sub-chunk
    
    writeUTFBytes(view, 12, 'fmt ');
    
    view.setUint32(16, 16, true);
    
    view.setUint16(20, 1, true);
    
    // stereo (2 channels)
    
    view.setUint16(22, 2, true);
    
    view.setUint32(24, sampleRate, true);
    
    view.setUint32(28, sampleRate * 4, true);
    
    view.setUint16(32, 4, true);
    
    view.setUint16(34, 16, true);
    
    // data sub-chunk
    
    writeUTFBytes(view, 36, 'data');
    
    view.setUint32(40, interleaved.length * 2, true);
    

    

    
    var lng = interleaved.length;
    
    var index = 44;
    
    var volume = 1;
    
    for (var i = 0; i < lng; i++){
    
        view.setInt16(index, interleaved[i] * (0x7FFF * volume), true);
    
        index += 2;
    
    }
    

    
    var blob = new Blob ( [ view ], { type : 'audio/wav' } );
    

    
    // let's save it locally
    

    
    document.getElementById('output').innerHTML='Handing off the file now...';
    
    var url = (window.URL || window.webkitURL).createObjectURL(blob);
    

    
    var li = document.createElement('li');
    
    var au = document.createElement('audio');
    
    var hf = document.createElement('a');
    

    
    au.controls = true;
    
    au.src = url;
    
    hf.href = url;
    
    hf.download = 'audio_recording_' + new Date().getTime() + '.wav';
    
    hf.innerHTML = hf.download;
    
    li.appendChild(au);
    
    li.appendChild(hf);
    
    recordingList.appendChild(li);
    

    
}
    
}
    

    

    
function success(e){
    

    
audioContext = window.AudioContext || window.webkitAudioContext;
    
context = new audioContext();
    

    

    
volume = context.createGain();
    

    
// creates an audio node from the microphone incoming stream(source)
    
source = context.createMediaStreamSource(e);
    

    
// connect the stream(source) to the gain node
    
source.connect(volume);
    

    
var bufferSize = 2048;
    

    
recorder = context.createScriptProcessor(bufferSize, 2, 2);
    

    
//node for the visualizer
    
analyser = context.createAnalyser();
    
analyser.smoothingTimeConstant = 0.3;
    
analyser.fftSize = 512;
    

    
splitter = context.createChannelSplitter();
    
//when recording happens
    
recorder.onaudioprocess = function(e){
    

    
    if (!recording) return;
    
    var left = e.inputBuffer.getChannelData (0);
    
    var right = e.inputBuffer.getChannelData (1);
    

    
    leftchannel.push (new Float32Array (left));
    
    rightchannel.push (new Float32Array (right));
    
    recordingLength += bufferSize;
    

    
    // get the average for the first channel
    
    var array =  new Uint8Array(analyser.frequencyBinCount);
    
    analyser.getByteFrequencyData(array);
    

    
    var c=document.getElementById("myCanvas");
    
    var ctx = c.getContext("2d");
    
    // clear the current state
    
    ctx.clearRect(0, 0, 1000, 325);
    
    var gradient = ctx.createLinearGradient(0,0,0,300);
    
    gradient.addColorStop(1,'#000000');
    
    gradient.addColorStop(0.75,'#ff0000');
    
    gradient.addColorStop(0.25,'#ffff00');
    
    gradient.addColorStop(0,'#ffffff');
    
    // set the fill style
    
    ctx.fillStyle=gradient;
    
    drawSpectrum(array);
    
    function drawSpectrum(array) {
    
        for ( var i = 0; i < (array.length); i++ ){
    
                var value = array[i];
    
                ctx.fillRect(i*5,325-value,3,325);
    
            } 
    

    
    }
    
}
    

    
function getAverageVolume(array) {
    
    var values = 0;
    
    var average;
    

    
    var length = array.length;
    

    
    // get all the frequency amplitudes
    
    for (var i = 0; i < length; i++) {
    
        values += array[i];
    
    }
    

    
    average = values / length;
    
    return average;
    
}
    

    
    // we connect the recorder(node to destination(speakers))
    
    volume.connect(splitter);
    
    splitter.connect(analyser, 0, 0);
    

    
    analyser.connect(recorder);
    
    recorder.connect(context.destination);
    

    
}
    

    

    

    

    
function mergeBuffers(channelBuffer, recordingLength){
    
var result = new Float32Array(recordingLength);
    
var offset = 0;
    
var lng = channelBuffer.length;
    
for (var i = 0; i < lng; i++){
    
var buffer = channelBuffer[i];
    
result.set(buffer, offset);
    
offset += buffer.length;
    
}
    
    return result;
    
   }
    

    
function interleave(leftChannel, rightChannel){
    
var length = leftChannel.length + rightChannel.length;
    
var result = new Float32Array(length);
    

    
var inputIndex = 0;
    

    
for (var index = 0; index < length; ){
    
 result[index++] = leftChannel[inputIndex];
    
 result[index++] = rightChannel[inputIndex];
    
 inputIndex++;
    
}
    
return result;
    
}
    

    

    
function writeUTFBytes(view, offset, string){ 
    
var lng = string.length;
    
for (var i = 0; i < lng; i++){
    

    
view.setUint8(offset + i, string.charCodeAt(i));
    
}
    
}

    and here is the html code :

        
    
    
    
    
    
    <code class="echappe-js">&lt;script src=&quot;http://stackoverflow.com/feeds/tag/js/functions.js&quot;&gt;&lt;/script&gt;

    • Révision 18368 : Révision du code HTML produit par le filtre agenda_memo (et son utilisation impl...

      22 août 2011, par esj@rezo.net

      remplacement de "cellpadding" par la propriété CSS "padding" * remplacement de "cellspacing=0" par la propriété CSS "border-collapse : collapse * remplacement de la plupart des tables par des Div positionnéés, afin d’évacuer certaines tables imbriquées * mise en Ajax du triple mini-agenda aparaissant au (...)

    Navigation