多线程-锁

4路相机获得数据后，在执行录制业务

        AtomicBoolean mSyncReady = new AtomicBoolean(false);
        mSyncReady.set(true);
        synchronized (mSyncReady) {
            mSyncReady.notify();
        }

同步信号,等到4录同步录制

        while (!isRecordFinish.get()) {
            if (!mSyncReady.get()) {
                synchronized (mSyncReady) {
                    try {
                    mSyncReady.wait(WAIT_SYNC_READY_TIME);
                    } catch (InterruptedException e) {
                    }
                    mSyncReady.set(true);
                }
            }
        }
//dosomthing 分割视频