CameraContext.startRecord(Object object)

timeoutnumber30否录制时长上限，单位为秒，最长不能超过 5 分钟

实际测试发现正常录制视频在115s，超过120s回调函数均不回调，文档显示支持5分钟以内视频录制。

 startRecord() {
        let that = this;
        let recordTime = 115;
        let totalInterval = recordTime * 1000;
        let totalTime = 0;
        let intervalId;
        this.ctx.startRecord({
            timeout: recordTime,
            timeoutCallback: () => {
                console.log('=========>timeoutCallback')
                clearInterval(intervalId);
                that.stopRecord();
            },
            success: () => {
                console.log('=============>success')
            },
            fail: () => {
                console.log('=============>fail')
            },
            complete: () => {
                console.log('=============>complete')
            }
        })
        intervalId = setInterval(function () {
            totalTime++;
            console.log('=============>totalTime:' + totalTime)
        }, 1000);
    },
测试基于官方提供demo进行测试，小程序版本：2.22.0
模拟器版本：iphone 6/7/8 (275*667 Dpr:2)