我知道有很多相似的線程查詢同樣的問題,但我的電腦正在加載本地存儲的MP3文件。網站沒有託管,我完全在離線設置。「MediaElementAudioSource輸出零由於CORS訪問限制」,而加載本地MP3文件
我下面貼在下面創建一個音頻分析儀教程:http://www.developphp.com/video/JavaScript/Analyser-Bars-Animation-HTML-Audio-API-Tutorial
我已經改變了過時的WebKit功能。 crossOrigin =「anonymous」不起作用,我認爲它不相關,因爲我的文件是在本地託管的。 將crossOrigin設置爲「anonymouse」可消除錯誤,但播放按鈕呈灰色。沒有腳本錯誤,只是標題中概述的CORS訪問問題。下面是完整的javascript:https://jsfiddle.net/kshatriiya/p8u5h3dz/
var audio = new Audio();
audio.src = 'track1.mp3';
audio.controls = true;
audio.loop = true;
audio.autoplay = true;
// Establish all variables that your Analyser will use
var canvas, ctx, source, context, analyser, fbc_array, bars, bar_x, bar_width, bar_height;
// Initialize the MP3 player after the page loads all of its HTML into the window
window.addEventListener("load", initMp3Player, false);
function initMp3Player(){
document.getElementById('audio_box').appendChild(audio);
context = new webkitAudioContext(); // AudioContext object instance
analyser = context.createAnalyser(); // AnalyserNode method
canvas = document.getElementById('analyser_render');
ctx = canvas.getContext('2d');
// Re-route audio playback into the processing graph of the AudioContext
source = context.createMediaElementSource(audio);
source.connect(analyser);
analyser.connect(context.destination);
frameLooper();
}
// frameLooper() animates any style of graphics you wish to the audio frequency
// Looping at the default frame rate that the browser provides(approx. 60 FPS)
function frameLooper(){
window.webkitRequestAnimationFrame(frameLooper);
fbc_array = new Uint8Array(analyser.frequencyBinCount);
analyser.getByteFrequencyData(fbc_array);
ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear the canvas
ctx.fillStyle = '#00CCFF'; // Color of the bars
bars = 100;
for (var i = 0; i < bars; i++) {
bar_x = i * 3;
bar_width = 2;
bar_height = -(fbc_array[i]/2);
// fillRect(x, y, width, height) // Explanation of the parameters below
ctx.fillRect(bar_x, canvas.height, bar_width, bar_height);
}
}
你能顯示你的標記嗎? – vvtx
@vvtx當然,這裏是jsfiddle,我還沒有加載一個曲目,雖然該文件是我的高清:https://jsfiddle.net/kshatriiya/p8u5h3dz/ – kshatriiya