Xiaoqiang's road to HTML5 mobile development (5) – making a beautiful video player
黄舟
Release： 2018-05-24 14:40:02
Original
11389 people have browsed it
In the previous articles, we introduced the characteristics of HTML5 and the basic knowledge that needs to be mastered. Now let’s start to truly experience the advantages of Html5. Let’s start making a beautiful video player. Don’t worry, before we start making it. Let’s first understand the basic knowledge of video files.
1. Video format
The currently more mainstream and commonly used video formats are: avi, rmvb, wmv, mpeg4, ogg, and webm. These videos are composed of three parts: video, audio, and encoding format. In HTML5, there are currently many different sets of encoders depending on the browser:
H.264 (personally not optimistic): This encoder is the encoder in Apple systems including Apple mobile phones, and has a patent video encoder. Royalties may be charged for any part of the encoding and transmission process. Therefore, Safari (Apple's browser) and Internet Explorer support this encoder. However, at a time when open source has become a general trend, it is still charging patent fees in browsers. I am really not optimistic about it.
Theora: This is a patent-free encoding format and a free video encoder for all levels of encoding, transmission and playback. Chrome, Firefox and Opera support this encoder.
VP8: This video encoder is similar to Theora, but its owner is Google, which has been open source, so no patent fees are required. Chrome, Firefox and Opera support this encoder.
AAC: audio codec, the same as H.264, this audio codec has patent restrictions, Safari, Chrome and Internet Explorer support this audio codec.
MP3: Also a patented technology, this audio encoder is supported by Safari, Chrome and Internet Explorer.
PCM: A format for storing data on audio CDs that stores complete data encoded by an analog-to-digital converter. Therefore, the file size of the Chinese lossless encoder is generally several times that of AAC and MP3 files. Safari, Firefox and Internet Explorer support this audio encoder.
Vorbis: The file extension is .ogg, sometimes also called Ogg Vorbis. This audio encoder is not protected by patents and is therefore copyright free. Supported browsers include Chrome, Firefox and Opera.
Video and audio supported by major browsers and devices
2.
In html5, you can use the
<video src="move.mp4"></video>
Copy after login
There are many attributes in the video tag. For example, the controls attribute can control whether There is a console.
From the above video formats, we can see that different browsers support different video formats, so we can use the tag to specify videos in multiple formats. By default, the browser will automatically Start downloading the file to determine its type.
$(document).ready(function(){
//INITIALIZE
var video = $('#myVideo');
//remove default control when JS loaded
video[0].removeAttribute("controls");
$('.control').show().css({'bottom':-45});
$('.loading').fadeIn(500);
$('.caption').fadeIn(500);
//before everything get started
video.on('loadedmetadata', function() {
$('.caption').animate({'top':-45},300);
//set video properties
$('.current').text(timeFormat(0));
$('.duration').text(timeFormat(video[0].duration));
updateVolume(0, 0.7);
//start to get video buffering data
setTimeout(startBuffer, 150);
//bind video events
$('.videoContainer')
.append('<p id="init"></p>')
.hover(function() {
$('.control').stop().animate({'bottom':0}, 500);
$('.caption').stop().animate({'top':0}, 500);
}, function() {
if(!volumeDrag && !timeDrag){
$('.control').stop().animate({'bottom':-45}, 500);
$('.caption').stop().animate({'top':-45}, 500);
}
})
.on('click', function() {
$('#init').remove();
$('.btnPlay').addClass('paused');
$(this).unbind('click');
video[0].play();
});
$('#init').fadeIn(200);
});
//display video buffering bar
var startBuffer = function() {
var currentBuffer = video[0].buffered.end(0);
var maxduration = video[0].duration;
var perc = 100 * currentBuffer / maxduration;
$('.bufferBar').css('width',perc+'%');
if(currentBuffer < maxduration) {
setTimeout(startBuffer, 500);
}
};
//display current video play time
video.on('timeupdate', function() {
var currentPos = video[0].currentTime;
var maxduration = video[0].duration;
var perc = 100 * currentPos / maxduration;
$('.timeBar').css('width',perc+'%');
$('.current').text(timeFormat(currentPos));
});
//CONTROLS EVENTS
//video screen and play button clicked
video.on('click', function() { playpause(); } );
$('.btnPlay').on('click', function() { playpause(); } );
var playpause = function() {
if(video[0].paused || video[0].ended) {
$('.btnPlay').addClass('paused');
video[0].play();
}
else {
$('.btnPlay').removeClass('paused');
video[0].pause();
}
};
//speed text clicked
$('.btnx1').on('click', function() { fastfowrd(this, 1); });
$('.btnx3').on('click', function() { fastfowrd(this, 3); });
var fastfowrd = function(obj, spd) {
$('.text').removeClass('selected');
$(obj).addClass('selected');
video[0].playbackRate = spd;
video[0].play();
};
//stop button clicked
$('.btnStop').on('click', function() {
$('.btnPlay').removeClass('paused');
updatebar($('.progress').offset().left);
video[0].pause();
});
//fullscreen button clicked
$('.btnFS').on('click', function() {
if($.isFunction(video[0].webkitEnterFullscreen)) {
video[0].webkitEnterFullscreen();
}
else if ($.isFunction(video[0].mozRequestFullScreen)) {
video[0].mozRequestFullScreen();
}
else {
alert('Your browsers doesn\'t support fullscreen');
}
});
//light bulb button clicked
$('.btnLight').click(function() {
$(this).toggleClass('lighton');
//if lightoff, create an overlay
if(!$(this).hasClass('lighton')) {
$('body').append('<p class="overlay"></p>');
$('.overlay').css({
'position':'absolute',
'width':100+'%',
'height':$(document).height(),
'background':'#000',
'opacity':0.9,
'top':0,
'left':0,
'z-index':999
});
$('.videoContainer').css({
'z-index':1000
});
}
//if lighton, remove overlay
else {
$('.overlay').remove();
}
});
//sound button clicked
$('.sound').click(function() {
video[0].muted = !video[0].muted;
$(this).toggleClass('muted');
if(video[0].muted) {
$('.volumeBar').css('width',0);
}
else{
$('.volumeBar').css('width', video[0].volume*100+'%');
}
});
//VIDEO EVENTS
//video canplay event
video.on('canplay', function() {
$('.loading').fadeOut(100);
});
//video canplaythrough event
//solve Chrome cache issue
var completeloaded = false;
video.on('canplaythrough', function() {
completeloaded = true;
});
//video ended event
video.on('ended', function() {
$('.btnPlay').removeClass('paused');
video[0].pause();
});
//video seeking event
video.on('seeking', function() {
//if video fully loaded, ignore loading screen
if(!completeloaded) {
$('.loading').fadeIn(200);
}
});
//video seeked event
video.on('seeked', function() { });
//video waiting for more data event
video.on('waiting', function() {
$('.loading').fadeIn(200);
});
//VIDEO PROGRESS BAR
//when video timebar clicked
var timeDrag = false; /* check for drag event */
$('.progress').on('mousedown', function(e) {
timeDrag = true;
updatebar(e.pageX);
});
$(document).on('mouseup', function(e) {
if(timeDrag) {
timeDrag = false;
updatebar(e.pageX);
}
});
$(document).on('mousemove', function(e) {
if(timeDrag) {
updatebar(e.pageX);
}
});
var updatebar = function(x) {
var progress = $('.progress');
//calculate drag position
//and update video currenttime
//as well as progress bar
var maxduration = video[0].duration;
var position = x - progress.offset().left;
var percentage = 100 * position / progress.width();
if(percentage > 100) {
percentage = 100;
}
if(percentage < 0) {
percentage = 0;
}
$('.timeBar').css('width',percentage+'%');
video[0].currentTime = maxduration * percentage / 100;
};
//VOLUME BAR
//volume bar event
var volumeDrag = false;
$('.volume').on('mousedown', function(e) {
volumeDrag = true;
video[0].muted = false;
$('.sound').removeClass('muted');
updateVolume(e.pageX);
});
$(document).on('mouseup', function(e) {
if(volumeDrag) {
volumeDrag = false;
updateVolume(e.pageX);
}
});
$(document).on('mousemove', function(e) {
if(volumeDrag) {
updateVolume(e.pageX);
}
});
var updateVolume = function(x, vol) {
var volume = $('.volume');
var percentage;
//if only volume have specificed
//then direct update volume
if(vol) {
percentage = vol * 100;
}
else {
var position = x - volume.offset().left;
percentage = 100 * position / volume.width();
}
if(percentage > 100) {
percentage = 100;
}
if(percentage < 0) {
percentage = 0;
}
//update volume bar and video volume
$('.volumeBar').css('width',percentage+'%');
video[0].volume = percentage / 100;
//change sound icon based on volume
if(video[0].volume == 0){
$('.sound').removeClass('sound2').addClass('muted');
}
else if(video[0].volume > 0.5){
$('.sound').removeClass('muted').addClass('sound2');
}
else{
$('.sound').removeClass('muted').removeClass('sound2');
}
};
//Time format converter - 00:00
var timeFormat = function(seconds){
var m = Math.floor(seconds/60)<10 ? "0"+Math.floor(seconds/60) : Math.floor(seconds/60);
var s = Math.floor(seconds-(m*60))<10 ? "0"+Math.floor(seconds-(m*60)) :Math.floor(seconds-(m*60));
return m+":"+s;
};
});
Copy after login
Above It's Xiaoqiang's HTML5 mobile development road (5) - the content of making a beautiful video player. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
