css 图片固定高度

1.background url center/cover

            <div class="img-box" style="background: url(<%=listimg%>) center/cover">
                <a href="./directSeeding.html?id=<%=id%>" target="@@if targetblank _blank @@endif">
                    
                    <div class="img-back"></div>
                    <h5 class="play">播放</h5>
                    <span class="mark_custom"><span class="mark_inner"><%=duration %></span></span>
                </a>
            </div>

.video-container .live-item .img-box{
    /*min-height: 200px;*/
    /*height: 200px;*/
    min-height: 203px;
    height: 203px;
}

2.

.videobox_c .video-message .room-picture img {
    height: 100%;
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate3d(-50%,-50%,0);
    -moz-transform: translate3d(-50%,-50%,0);
    transform: translate3d(-50%,-50%,0);
}