當(dāng)一收到上傳圖片視頻并可以動(dòng)態(tài)設(shè)置視頻顯示的海報(bào)幀的需求時(shí),主要想的是怎么樣解析視頻并獲取保存每幀的圖片,百度出來的大多是類似下面這種需要播放video并點(diǎn)擊截圖的,或者是用php ffmpeg擴(kuò)展,跟需求不一致,有點(diǎn)抓狂了,然后就先做了視頻圖片的預(yù)覽功能,進(jìn)而對(duì)設(shè)置海報(bào)幀換了種思路,通過輸入設(shè)置video開始播放的時(shí)間,取消自動(dòng)播放和控制條,這樣用戶看到的就是一張圖片
/*預(yù)覽*/
$('.qtuploader__items').on('click', '[name="viewVideoPicBtn"]', function() {
var parent = $(this).closest('.qtab__page');
var video = $(this).closest('.qtuploader__itemsbd').find('video');
var srcStr = '', htmlStr = '';
if($(this).siblings('.qtuploader__picinputbox').hasClass('is-error')){
$.fn.toast({
'parentDom': parent,
'classes': 'isorange',
'top': '0',
'spacing': 0,
'toastContent': '請(qǐng)?jiān)O(shè)置正確范圍的海報(bào)幀',
'autoHide': 3000,
'position': {
'top': '5px',
'left': '50%'
}
});
return;
}
if (video.length > 0) {
var thumbHeight = setSize(video)[0];
var thumbWidth = setSize(video)[1];
srcStr = video.attr('src');
htmlStr = '<div class="qtuploader__view"><div class="qtuploader__mask"></div><div class="qtuploader__thumb" style="width:' + thumbWidth + 'px;height:' + thumbHeight + 'px;margin:0 auto;"><video controls width="' + thumbWidth + '" height="' + thumbHeight + '" src="' + srcStr + '">您的瀏覽器不支持 video 標(biāo)簽</video></div></div>';
}
parent.append(htmlStr);
parent.find('.qtuploader__view video')[0].currentTime = $(this).siblings('.qtuploader__picinputbox').find('.qtuploader__picinput').val();
parent.find('.qtuploader__view').fadeIn();
});
/*設(shè)置海報(bào)幀預(yù)覽時(shí)間*/
$('.qtuploader__items').on('keyup', '.qtuploader__picinput', function() {
var parent = $(this).closest('.qtuploader__picinputbox');
var video = $(this).closest('.qtuploader__itemsbd').find('video');
var strVal = $.trim($(this).val());
console.log(strVal)
if (strVal == '') {
parent.addClass('is-error');
parent.find('.qverify__font').text('請(qǐng)?jiān)O(shè)置海報(bào)幀');
} else if (!(/^[0-9]*$/.test(strVal))) {
parent.addClass('is-error');
parent.find('.qverify__font').text('請(qǐng)輸入數(shù)字');
} else if (video.length > 0 && strVal > video[0].duration) {
parent.addClass('is-error');
parent.find('.qverify__font').text('不超過(' + video[0].duration + ')');
console.log('111---' + video[0].duration)
} else {
parent.removeClass('is-error');
parent.find('.qverify__font').text('請(qǐng)?jiān)O(shè)置海報(bào)幀');
}
})
/*關(guān)閉預(yù)覽*/
$(document).undelegate('.qtuploader__mask', 'click');
$(document).delegate('.qtuploader__mask', 'click', function() {
$(this).closest('.qtuploader__view').fadeOut('normal', function() {
$(this).closest('.qtuploader__view').remove();
})
})
/*設(shè)置預(yù)覽大小*/
function setSize(element) {
var thumbWidth = 0, thumbHeight = 0, arr = [];
var winWidth = $(window).width(), winHeight = $(window).height();
var imgWidth = element.width(), imgHeight = element.height();
if (imgWidth > imgHeight) {
thumbHeight = parseInt(winHeight - 200);
thumbWidth = parseInt((1920 * thumbHeight) / 1080);
} else {
thumbHeight = parseInt(winHeight - 200);
thumbWidth = parseInt((1080 * thumbHeight) / 1920);
}
arr.push(thumbHeight, thumbWidth)
return arr;
}
以上所述是小編給大家介紹的HTML5 video 上傳預(yù)覽圖片視頻如何設(shè)置、預(yù)覽視頻某秒的海報(bào)幀,希望對(duì)大家有所幫助,如果大家有任何疑問請(qǐng)給我留言,小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持!