为什么不能设置此音频的playbackRate? [英] Why can't I set the playbackRate of this audio?

问题描述

因此，我正在尝试解决网络视频的音频延迟问题.例如，如果我转到youtube并发现视频与音频不匹配，我想推迟或预播放音频，以使其与视频同步.我已经弄清楚了如何推迟音频，但是我却想不出如何提前播放音频.请帮助

So I am trying to fix an audio delay problem on web videos. e.g If I go on to youtube and see that the video doesn't match with the audio, I want to postpone or pre-play the audio, so that it syncs with the video. I have figured out how to postpone the audio, but I couldn't figure out how to pre-play the audio. Please help

我尝试将音频播放速率设置为2.0，然后将其设置回1.0，因此1秒钟后，它将同步视频.但是我无法设置从网页获得的音频的播放速率.

I have tried setting the audio playback rate to be 2.0 and set it back to 1.0 after, so after 1 second, it will sync will the video. But I can't set the playback rate of the audio I got from webpages.

var audio = document.createElement('audio')

How I got the audio
chrome.tabCapture.capture({audio: true}, stream => {
    audio.srcObject = stream;
    audio.playbackRate = 2.0;
    console.log(audio.playbackRate);
}

当打印出回放速率时，它是1而不是2.0

When the playback rate gets printed out, it is 1 instead of 2.0

我做错了什么吗?

推荐答案

哦，这是实时资源，不是来自文件.您无法更改播放速率.

Oh, this is a live source, not from a file. You can't change the playback rate.

这样想吧...如果您可以加快实况录制的速度，那么您实际上将进入未来！

Think about it this way... if you could speed up something that's being recorded live, you would effectively be going into the future!

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