HarmonyOS Camera kit 自定义相机，每次开启录像都会session.stop，再session.start。这个过程预览流会中断

await this.capSession.stop(); 
this.capSession.beginConfig(); 
if (this.photoOutput) { 
  this.capSession.removeOutput(this.photoOutput); // 移除拍照流 
  this.photoOutput = undefined 
} 
if (this.videoOutput) { 
  this.capSession.removeOutput(this.videoOutput) // 移除录像流 
} 
await this.createRecordOutput() // 创建拍照流 
this.capSession.addOutput(this.videoOutput); 
await this.capSession.commitConfig(); 
await this.capSession.start(); 
await this.videoOutput?.start(); 
await this.avRecorder?.start();