我花了很多时间试图弄清楚为什么视频会像这样嵌入:
<video height="256" loop autoplay muted controls id="vid">
<source type="video/mp4" src="video_file.mp4"></source>
<source type="video/ogg" src="video_file.ogg"></source>
</video>
一旦页面在FireFox中加载，就开始自动播放，但不能在基于Webkit的浏览器中自动播放。这只发生在一些随机的页面上。到目前为止我还没有找到原因。我怀疑一些未关闭的标签或CMS编辑器创建的大量JS。
当前回答
一开始我只能播放所有可见的视频，但旧手机的表现不太好。现在我播放离窗口中心最近的视频，然后暂停其他视频。香草JS。你可以选择你喜欢的算法。
//slowLooper(playAllVisibleVideos);
slowLooper(playVideoClosestToCenter);
function isVideoPlaying(elem) {
if (elem.paused || elem.ended || elem.readyState < 2) {
return false;
} else {
return true;
}
}
function isScrolledIntoView(el) {
var elementTop = el.getBoundingClientRect().top;
var elementBottom = el.getBoundingClientRect().bottom;
var isVisible = elementTop < window.innerHeight && elementBottom >= 0;
return isVisible;
}
function playVideoClosestToCenter() {
var vids = document.querySelectorAll('video');
var smallestDistance = null;
var smallestDistanceI = null;
for (var i = 0; i < vids.length; i++) {
var el = vids[i];
var elementTop = el.getBoundingClientRect().top;
var elementBottom = el.getBoundingClientRect().bottom;
var elementCenter = (elementBottom + elementTop) / 2.0;
var windowCenter = window.innerHeight / 2.0;
var distance = Math.abs(windowCenter - elementCenter);
if (smallestDistance === null || distance < smallestDistance) {
smallestDistance = distance;
smallestDistanceI = i;
}
}
if (smallestDistanceI !== null) {
vids[smallestDistanceI].play();
for (var i = 0; i < vids.length; i++) {
if (i !== smallestDistanceI) {
vids[i].pause();
}
}
}
}
function playAllVisibleVideos(timestamp) {
// This fixes autoplay for safari
var vids = document.querySelectorAll('video');
for (var i = 0; i < vids.length; i++) {
if (isVideoPlaying(vids[i]) && !isScrolledIntoView(vids[i])) {
vids[i].pause();
}
if (!isVideoPlaying(vids[i]) && isScrolledIntoView(vids[i])) {
vids[i].play();
}
}
}
function slowLooper(cb) {
// Throttling requestAnimationFrame to a few fps so we don't waste cpu on this
// We could have listened to scroll+resize+load events which move elements
// but that would have been more complicated.
function repeats() {
cb();
setTimeout(function() {
window.requestAnimationFrame(repeats);
}, 200);
}
repeats();
}
其他回答
其他的答案都对我没用。 我的解决办法是触发点击视频本身;Hacky(因为需要超时)，但它工作正常:
function startVideoIfNotStarted () {
$(".id_of_video_tag").ready(function () {
window.setTimeout(function(){
videojs("id_of_video_tag").play()
}, 1000);
});
}
$(startVideoIfNotStarted);
我在iphone的Safari上播放视频时遇到了一个问题。在video标签中添加playsinline属性可以解决这个问题，而且它是有效的!
<video autoplay muted loop playsinline class="someClass">
<source src="source.mp4" type="video/mp4">
</video>
你也会在Safari和OSX上遇到这个问题，如果你对这个属性playsinline感到困惑，这里是解释。
移动浏览器，playsinline将播放视频的正确位置，而不是默认的全屏播放。
对于OSX上的Safari浏览器，由于网站默认的“自动播放”选项是“带声音停止媒体”，这种策略也会带来权限问题。
这就是为什么我们需要属性静音。
在Safari iOS上没有任何效果，直到我添加了playsinline属性到视频中
尝试一下，这是简单和简短的，它与我的代码工作，而我有视频全屏和其他元素后面，我只是使用z-index -1;
<video autoplay loop id="myVideo">
一开始我只能播放所有可见的视频，但旧手机的表现不太好。现在我播放离窗口中心最近的视频，然后暂停其他视频。香草JS。你可以选择你喜欢的算法。
//slowLooper(playAllVisibleVideos);
slowLooper(playVideoClosestToCenter);
function isVideoPlaying(elem) {
if (elem.paused || elem.ended || elem.readyState < 2) {
return false;
} else {
return true;
}
}
function isScrolledIntoView(el) {
var elementTop = el.getBoundingClientRect().top;
var elementBottom = el.getBoundingClientRect().bottom;
var isVisible = elementTop < window.innerHeight && elementBottom >= 0;
return isVisible;
}
function playVideoClosestToCenter() {
var vids = document.querySelectorAll('video');
var smallestDistance = null;
var smallestDistanceI = null;
for (var i = 0; i < vids.length; i++) {
var el = vids[i];
var elementTop = el.getBoundingClientRect().top;
var elementBottom = el.getBoundingClientRect().bottom;
var elementCenter = (elementBottom + elementTop) / 2.0;
var windowCenter = window.innerHeight / 2.0;
var distance = Math.abs(windowCenter - elementCenter);
if (smallestDistance === null || distance < smallestDistance) {
smallestDistance = distance;
smallestDistanceI = i;
}
}
if (smallestDistanceI !== null) {
vids[smallestDistanceI].play();
for (var i = 0; i < vids.length; i++) {
if (i !== smallestDistanceI) {
vids[i].pause();
}
}
}
}
function playAllVisibleVideos(timestamp) {
// This fixes autoplay for safari
var vids = document.querySelectorAll('video');
for (var i = 0; i < vids.length; i++) {
if (isVideoPlaying(vids[i]) && !isScrolledIntoView(vids[i])) {
vids[i].pause();
}
if (!isVideoPlaying(vids[i]) && isScrolledIntoView(vids[i])) {
vids[i].play();
}
}
}
function slowLooper(cb) {
// Throttling requestAnimationFrame to a few fps so we don't waste cpu on this
// We could have listened to scroll+resize+load events which move elements
// but that would have been more complicated.
function repeats() {
cb();
setTimeout(function() {
window.requestAnimationFrame(repeats);
}, 200);
}
repeats();
}
