建议直接用网络地址，不然主包就超出限制了

这个好像只支持分享卡片，参考文档https://developers.weixin.qq.com/miniprogram/dev/framework/liveplayer/component-api.html#5.%20%E3%80%90%E8%8E%B7%E5%8F%96%E5%88%86%E4%BA%AB%E5%8D%A1%E7%89%87%E9%93%BE%E6%8E%A5%E5%8F%82%E6%95%B0%E3%80%91%E6%8E%A5%E5%8F%A3%EF%BC%88%E6%B3%A8%EF%BC%9A%E8%8B%A5%E8%A6%81%E4%BD%BF%E7%94%A8%E8%AF%A5%E6%8E%A5%E5%8F%A3%EF%BC%8C%E9%9C%80%E5%9C%A8%E4%B8%BB%E5%8C%85/%E5%88%86%E5%8C%85%E5%85%88%E5%BC%95%E5%85%A5%E7%9B%B4%E6%92%AD%E7%BB%84%E4%BB%B6%EF%BC%89