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我正在研究需要連接到現有視頻標籤的項目來抓取音頻,並對音頻執行一些小操作。使用ScriptProcessorNode播放音頻會產生淺色背景噪音
var MyContext = new (window.AudioContext || window.webkitAudioContext)();
var source = MyContext.createMediaElementSource(video);
audioScript = MyContext.createScriptProcessor(512,2,2);
source.connect(audioScript);
audioScript.connect(MyContext.destination);
audioScript.onaudioprocess = function(audioProcessingEvent) {
\t var inputBuffer = audioProcessingEvent.inputBuffer;
\t \t // The output buffer contains the samples that will be modified and played
\t \t var outputBuffer = audioProcessingEvent.outputBuffer;
\t \t for (var channel = 0; channel < 2; channel++)
\t \t {
\t \t \t var inputData = inputBuffer.getChannelData(channel);
\t \t \t outputBuffer.copyToChannel(inputData, channel);
\t \t }
}
的問題是,我不斷收到的音頻淺色背景噪音。即使我不做任何事情,只需將輸入複製到輸出,我就會聽到輕微的噪音。
任何想法這是什麼原因?
謝謝!