我已经看到有一些针对HTML5视频的提示点的解决方案是将元素包装在Javascript中并使用PopcornJS,CuepointsJS等在轨道上的不同时间触发播放。
但那里有什么东西不仅允许HTML5视频上的提示点,而且还会触发停止吗?就像我想在一个视频中设置“章节”,我点击一个播放0:25到0:45并在0:45停止的链接我希望在1个视频中有多个提示和停止,有没有什么可以实现这一点?
提前致谢。
答案 0 :(得分:1)
这是我用来处理提示点的一些相对简单的代码。它存在于这个要点(https://gist.github.com/positlabs/30605eccf05375da14f1)
中/*
// mapping cues to methods
var cuepointMethods = {
"1": function(){},
"2.82": function(){},
"3.31": function(){}
};
// instantiate with <video>, and an array of cuepoint times => [1, 2.82, 3.31]
var cp = new CuePoints(document.querySelector('#video'), Object.keys(cuepointMethods));
// listen for cue event
cp.on('cue', function(cue){
// do something with the cue
// in this example, we map the cue to a method
cuepointMethods[cue]();
});
*/
window.CuePoints = function(video, cuepoints){
this.video = video;
this.cuepoints = cuepoints;
video.addEventListener('play', this._onPlayVideo.bind(this));
if(!video.paused) this._onPlayVideo();
};
// https://www.npmjs.com/package/backbone-events-standalone
CuePoints.prototype = BackboneEvents.mixin({});
CuePoints.prototype._onPlayVideo = function(){
this._prevTime = this.video.currentTime;
// start animationframe
this._onFrame();
};
CuePoints.prototype._onFrame = function(){
// only fire cue events if video is playing. Might not be wanted in some cases...
if(this.video.paused) return;
this.cuepoints.forEach(function(cuepoint){
if(cuepoint >= this._prevTime && cuepoint < this.video.currentTime){
this.trigger('cue', cuepoint);
}
}.bind(this));
this._prevTime = this.video.currentTime;
requestAnimationFrame(this._onFrame.bind(this));
};
答案 1 :(得分:0)
HTML5提示对象有一个名为“pauseOnExit”的属性。
此功能在Chrome和Opera中实现。您可以使用webshims之类的polyfill在所有浏览器中实现此功能。
var cue = new TextTrackCue(0.5, 5, "My first Cue");
cue.pauseOnExit = true;