Html5 video 上传预览图片视频，设置、预览视频某秒的海报帧

/*预览*/ $('.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': '请设置正确范围的海报帧', '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="'%20+%20srcStr%20+%20'">您的浏览器不支持 video 标签</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(); }); /*设置海报帧预览时间*/ $('.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('请设置海报帧'); } else if (!(/^[0-9]*$/.test(strVal))) { parent.addClass('is-error'); parent.find('.qverify__font').text('请输入数字'); } else if (video.length > 0 && strVal > video[0].duration) { parent.addClass('is-error'); parent.find('.qverify__font').text('不超过(' + video[0].duration + ')'); console.log('111---' + video[0].duration) } else { parent.removeClass('is-error'); parent.find('.qverify__font').text('请设置海报帧'); } }) /*关闭预览*/ $(document).undelegate('.qtuploader__mask', 'click'); $(document).delegate('.qtuploader__mask', 'click', function() { $(this).closest('.qtuploader__view').fadeOut('normal', function() { $(this).closest('.qtuploader__view').remove(); }) }) /*设置预览大小*/ 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; }