如何在html5和js中下载一部分视频

how to download a part of video in html5 and js

我想下载或保存正在 HTML 中播放的视频的一部分,我不想访问网络摄像头和麦克风我只需要下载或播放视频标签的一部分在另一个视频标签中或下载它...我该怎么做?...我看到的任何东西正在访问麦克风和网络摄像头

    <video id="yourVideoplayer" width="640" height="480" preload="auto"> //preload="auto" buffers the video if initialize. you cannot seek a video which isn t buffering already
  <source src="test.mp4" type="video/mp4" />
  <source src="test.ogv" type="video/ogg" /> 
  This browser is not compatible with HTML 5
</video>

我想要一个按钮从播放的视频开始录制然后我想保存它

<!DOCTYPE html>
<html>
<body>    
<video id="original-video" width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>
<video width="320" height="240" data-from="original-video" data-start="5" data-end="10" data-autoreplay="true" autoplay>
</video>
<video width="320" height="240" data-from="original-video" data-start="5" data-end="10" data-autoreplay="false" autoplay>
</video>
<script>
const body = document.querySelector('body');
const videos = document.querySelectorAll('video[data-from]');

videos.forEach(video=>{
    const originalVideo = document.getElementById(video.dataset.from);
    [...originalVideo.children].forEach(child=>{
        video.appendChild(child.cloneNode())
    });

    video.duration = Number(video.dataset.end) - Number(video.dataset.start);
    video.currentTime = video.dataset.start;

    video.addEventListener('timeupdate', (e)=>{
      if(video.currentTime>=video.dataset.end){
          video.pause();
          video.currentTime=video.dataset.start;
          if(video.dataset.autoreplay==="true"){
            video.play();
          }
      }
    });
});

</script>
</body>

这是我能得到的最接近您要求的。您使用 data 属性指定:

  • 原视频
  • 开始
  • 结束
  • 如果它应该不停地重播