uni.createInnerAudioContext获取不到时长

分类：uni-app

使用onCanplay方法监听，获取不到音频时长，小程序和app输出都是0，h5输出Infinity
代码：
this.context = uni.createInnerAudioContext();
this.context.src = "http://dp-ftpserver.oss-cn-shanghai.aliyuncs.com/families-school-connection/file/15cf3add-2e83-41ac-bec0-d524b7fafe04";
this.context.onCanplay(() => {
this.context.duration;
setTimeout(()=>{
this.duration = this.context.duration;
console.log(this.duration)
},1000)
})