html5支持視頻播放,並且趨勢,facebook也全面切換到html5了,最近作一個簡單的視頻播放器,測試了好多jplayer,video.js之類的都以爲不太好,因此本身寫一個最簡單的,不過發現了一個問題,視頻播放以前的封面不太好……css
封面的尺寸被強制縮小了,我須要填充整個播放器的。html
< !DOCTYPE html> <html> <head> <meta charset="UTF-8"/> <title></title> <style type="text/css"> .video-container1{ width: 400px; height: 400px; border: solid; } .video1{ width: 100%; height: 100%; } </style> </head> <body> <div class="video-container1"> <video class="video1" src="oceans.mp4" poster="1.jpg" controls> </video> </div> </body> </html>
因此查了一下資料,並無發現html5的video屬性支持處理poster的尺寸問題,而後發現了一個hacker的方法:
The answer is actually quite simple. Instead of providing our poster image as a value to the poster attribute, we define it as a background image for our video element, and use the background-size property to tell the browser that the image is to cover the element in question:html5
將poster頁面設置爲一個透明的圖片或者不存在的值,這樣瀏覽器就會沒法顯示poster,而後經過設置播放器的css背景background,將咱們須要的背景圖放進去,而且填充背景,而且咱們用background-size屬性去告訴瀏覽器,這個播放器或者這個元素被這個圖片覆蓋。git
video{ width: 100%; height: 100%; background:transparent url('img/1.jpg') 50% 50% no-repeat; //下面就是background-size,每種瀏覽器都寫一個配置 -webkit-background-size:cover; -moz-background-size:cover; -o-background-size:cover; background-size:cover; }
詳細代碼在這裏:
友人提醒,將測試代碼放到github方便其餘人測試:(https://github.com/yuanyuanyuan/my-git/tree/master/test1)github
< !DOCTYPE html> <html> <head> <meta charset="UTF-8"/> <title></title> <style type="text/css"> .video-container1{ width: 400px; height: 400px; border: solid; } .video1{ width: 100%; height: 100%; } .video-container2{ width: 400px; height: 400px; border: solid; } .video2{ width: 100%; height: 100%; background:transparent url('1.jpg') 50% 50% no-repeat; -webkit-background-size:cover; -moz-background-size:cover; -o-background-size:cover; background-size:cover; } </style> </head> <body> <div class="video-container1"> <video class="video1" src="oceans.mp4" poster="1.jpg" controls> </video> </div> <div class="video-container2"> <video class="video2" src="oceans.mp4" poster="2.jpg" controls> </video> </div> </body> </html>
展現效果以下:web
引用參考:
http://www.iandevlin.com/blog/2013/03/html5/html5-video-and-background-images
http://www.w3school.com.cn/cssref/pr_background.asp
http://www.w3schools.com/css/css_image_transparency.asp瀏覽器