qt qml 调用相机时构建有问题，一秒报错四条以上，

I BufferQueueProducer: [SurfaceTexture-0-21483-0](this:0xc7beb000,id:0,api:4,p:319,c:21483) queueBuffer: slot 0 is dropped, handle=0xe0ea40c0
I CameraFramework: handleMessage: 16
I BufferQueueProducer: [SurfaceTexture-0-21483-0](this:0xc7beb000,id:0,api:4,p:319,c:21483) queueBuffer: slot 1 is dropped, handle=0xe0ea4180
I CameraFramework: handleMessage: 16
I BufferQueueProducer: [SurfaceTexture-0-21483-0](this:0xc7beb000,id:0,api:4,p:319,c:21483) queueBuffer: slot 2 is dropped, handle=0xe0ea4240
I CameraFramework: handleMessage: 16
I BufferQueueProducer: [SurfaceTexture-0-21483-0](this:0xc7beb000,id:0,api:4,p:319,c:21483) queueBuffer: slot 3 is dropped, handle=0xe7434340
I BufferQueueProducer: [SurfaceTexture-0-21483-0](this:0xc7beb000,id:0,api:4,p:319,c:21483) queueBuffer: fps=9.99 dur=1000.99 max=102.29 min=97.95
I CameraFramework: handleMessage: 16

这个是报错信息，

Popup{
        x:0
        y:0
        id:came
        modal: true
        focus: true
        width: meid.width
        height: meid.height
        closePolicy: Popup.CloseOnEscape | Popup.CloseOnPressOutsideParent
        background: Rectangle{color: "#262626"}
        Item {
            x: 0
            y: 0
            id: camitem
            width: meid.width
            height: meid.height
            Camera {
                id: camera
                captureMode: Camera.CaptureStillImage
                imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash
                exposure {
                    exposureCompensation: -1.0
                    exposureMode: Camera.ExposurePortrait
                }
                flash.mode: Camera.FlashRedEyeReduction
                imageCapture {
                    id: imgcape
                    onImageCaptured: {
                        photoPreviewe.source = preview
                    }
                    onImageSaved: {
                        camera.stop()
                    }
                }
            }

            VideoOutput {
                source: camera
                anchors.fill: parent
                focus : visible // to receive focus and capture key events when visible
            }

            Row{
                width: parent.width
                height: 30
                spacing: 30
                EButton{
                    id: campice
                    text: "拍照"
                    onClicked: {
                        camera.imageCapture.captureToLocation(mes.getSaveImagPath())
                    }
                }
                EButton{
                    id: campicee
                    text: "发送"
                    onClicked: {
                        faly = 0
                        mes.getdata()
                        mqtt.slot_SendMsg(mes.emeit(),test1,auth.mName,user)
                        console.log(mes.m_image,"Jshhh")
                        mes.addimage(mois1,user,"",auth.mName,"1",timeout)
                        add_message(mes.mData,"issame",mes.m_image,name1,"tip","send_type","id" )
                        list1.positionViewAtEnd() //回滚最后一条
                        camera.start()
                        cam.close()
                    }
                }
            }

            Image {
                id: photoPreviewe
                width: parent.width
                height: parent.height - 30
            }
        }
    }

这个是我写的，是有什么问题吗