html5如何获取音频资源6,从html5视频获取音频

不确定这是否回答您的问题，但您可以通过Web Audio API节点图运行视频的音频。下面的代码可以通过改变增益和滤波器参数来演示。我只在Chrome上测试过。

var video = document.createElement("video");

video.setAttribute("src", "ourMovie.mov");

video.controls = true;

video.autoplay = true;

document.body.appendChild(video);

var context = new webkitAudioContext();

var gainNode = context.createGain();

gainNode.gain.value = 1; // Change Gain Value to test

filter = context.createBiquadFilter();

filter.type = 2; // Change Filter type to test

filter.frequency.value = 5040; // Change frequency to test

// Wait for window.onload to fire. See crbug.com/112368

window.addEventListener('load', function(e) {

// Our element will be the audio source.

var source = context.createMediaElementSource(video);

source.connect(gainNode);

gainNode.connect(filter);

filter.connect(context.destination);

}, false);

我简单地更换与video要素的音频元件。