live-player 的封面图怎么调用？poster 不管用嘛？

<live-player                         // eslint-disable-next-line taro/props-reserve-keyword                         class='video-mod'                         src={jsonMain.play_url}                         poster={jsonMain.promote_img}                         mode='RTC'                         autoplay                         bindstatechange='statechange'                         binderror='error'                     />

poster 编译后代码里，显示了图片路径，但是不显示在画布上。感谢前辈