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
我的视频也出现了同样的问题
<video preload="none" autoplay="autoplay" loop="loop">
<source src="Home_Teaser.mp4" type="video/mp4">
<source src="Home_Teaser" type="video/webm">
<source src="Home_Teaser.ogv" type="video/ogg">
</video>
经过搜索，我找到了一个解决方案:
如果我设置“preload”属性为“true”，视频正常启动
其他回答
试试这个:
<video width="320" height="240" autoplay muted>
<source src="video.mp4" type="video/mp4">
</video>
我解决了同样的问题，
$(window).on('pageshow',function(){
var vids = document.querySelectorAll('video');
for (var i = 0; i < vids.length;){
vids[i].play();
}
})
您必须在页面显示后启动视频。
角10:
<video [muted]="true" [autoplay]="true" [loop]="true">
<source src="/assets/video.mp4" type="video/mp4"/>
</video>
在safari iPhone上，当电池电量不足，iPhone处于低电量模式时，它不会自动播放，即使你在视频html标签上设置了以下属性:自动播放，循环，静音，playsinline。
走一走我发现工作是有用户手势事件触发视频播放:
document.body.addEventListener("touchstart", function () {
var allVideos = document.querySelectorAll('video');
for (var i = 0; i < allVideos.length; i++) {
allVideos[i].play();
}
},{ once: true });
你可以在webkit网站上阅读更多关于iOS用户手势和视频策略的信息:
https://webkit.org/blog/6784/new-video-policies-for-ios/
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();
}
