我想使用 HTML5 和 CSS3 来加载 MP3/OGG,它将与正在显示的文本一起阅读。当它完成屏幕上的内容时,它会切换到新屏幕。
所以第一个屏幕会在 mp3 启动时加载,并一直持续到 12 秒(这是 mp3 上的声音读取它需要多长时间)。在 12 秒时,它切换到下一个文本,该文本将持续到 22 秒。总共将有7个段落。
下面是我找到的一些代码示例,但我无法对其进行编辑以在我需要的时间正常工作。
HTML的基础知识:
<audio controls="controls" preload="auto" autoplay="autoplay">
    <source src="valmp3.ogg" type="audio/ogg" />
    <source src="valmp3.mp3" type="audio/mpeg" />
        Your browser does not support the audio element.
</audio> 
<ul>
    <li>Paragraph 1</li>
    <!--^^Should load when the mp3 starts and stay for 12 seconds^^-->
    <li>Paragraph 2</li>
    <!--^^Should load at 12 seconds and stay until 22 seconds^^-->
    <li> Paragraph 3</li>
    <li> Paragraph 4</li>
    <li>Paragraph 5</li>
    <li>Paragraph 6</li>
    <li>Paragraph 7</li>
</ul>
CSS:
* {
  margin: 0;
  padding: 0;
}
body{
  background: #422A20;
  font-size: 2em;
}
ul {
  height: 100%;
  left: 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 0;
}
ul li {
  color: transparent;
  font-size: 250%;
  position: absolute;
  text-align: center;
  top: 35%;
  width: 100%;
}
/* delay between each text */
ul li:nth-child(1),
ul li:nth-child(2),
ul li:nth-child(3),
ul li:nth-child(4) {
  -moz-animation: blurFadeInOut 3s ease-in backwards;
  -ms-animation: blurFadeInOut 3s ease-in backwards;
  -webkit-animation: blurFadeInOut 3s ease-in backwards;
}
ul li:nth-child(1) {
  -webkit-animation-delay: 0s;
  -moz-animation-delay: 0s;
  -ms-animation-delay: 0s;
  animation-delay: 0s;
}
ul li:nth-child(2) {
  -webkit-animation-delay: 3s;
  -moz-animation-delay: 3s;
  -ms-animation-delay: 3s;
  animation-delay: 3s;
}
ul li:nth-child(3) {
  -webkit-animation-delay: 6s;
  -moz-animation-delay: 6s;
  -ms-animation-delay: 6s;
  animation-delay: 6s;
}
ul li:nth-child(4) {
  -webkit-animation-delay: 9s;
  -moz-animation-delay: 9s;
  -ms-animation-delay: 9s;
  animation-delay: 9s;
}
ul li:nth-child(5) {
  -webkit-animation-delay: 12s;
  -moz-animation-delay: 12s;
  -ms-animation-delay: 12s;
  animation-delay: 12s;
}
/* delay for the last slide */
ul li:nth-child(5) span {
  -webkit-animation: blurFadeIn 3s ease-in 12s backwards;
  -moz-animation: blurFadeIn 1s ease-in 12s backwards;
  -ms-animation: blurFadeIn 3s ease-in 12s backwards;
  animation: blurFadeIn 3s ease-in 12s backwards;
  color: transparent;
  text-shadow: 0px 0px 1px #fff;
}
ul li:nth-child(5) span:nth-child(2) {
  -webkit-animation-delay: 13s;
  -moz-animation-delay: 13s;
  -ms-animation-delay: 13s;
  animation-delay: 13s;
}
ul li:nth-child(5) span:nth-child(3) {
  -webkit-animation-delay: 14s;
  -moz-animation-delay: 14s;
  -ms-animation-delay: 14s;
  animation-delay: 14s;
}
动画代码:
@-moz-keyframes blurFadeInOut {
  0% { opacity: 0; text-shadow: 0px 0px 40px #fff; -moz-transform: scale(1.3); }
  25%, 75% { opacity: 1; text-shadow: 0px 0px 1px #fff; -moz-transform: scale(1); }
  100% { opacity: 0; text-shadow: 0px 0px 50px #fff; -moz-transform: scale(0); }
}
@-webkit-keyframes blurFadeInOut {
  0% { opacity: 0; text-shadow: 0px 0px 40px #fff; -webkit-transform: scale(1.3); }
  25%, 75% { opacity: 1; text-shadow: 0px 0px 1px #fff; -webkit-transform: scale(1); }
  100% { opacity: 0; text-shadow: 0px 0px 50px #fff; -webkit-transform: scale(0); }
}
@keyframes blurFadeInOut {
  0% { opacity: 0; text-shadow: 0px 0px 40px #fff; transform: scale(1.3); }
  25%, 75% { opacity: 1; text-shadow: 0px 0px 1px #fff; transform: scale(1); }
  100% { opacity: 0; text-shadow: 0px 0px 50px #fff; transform: scale(0); }
}