while not paramInit:
        time.sleep(1)

    print int(sys.argv[3])
    video_reader.setFrame(int(sys.argv[3]))
    (success, orig) = video_reader.getNextFrame()
    while True:
        I = orig.copy()
        fnum = video_reader.framenum
        print fnum
        T_from_l_to_i = np.eye(4)
        T_from_l_to_i[0:3, 0:3] = R
        T_from_i_to_l = np.linalg.inv(T_from_l_to_i)
        t = gps_times_mark2[fnum]
        builder.start_time = t
        builder.end_time = t + 3.0 * 1e6
        builder.step_time = 0.5
        builder.T_from_l_to_i = T_from_l_to_i
        builder.T_from_i_to_l = T_from_i_to_l
        builder.buildMap(filters=['no-trees'])

        data, data_times = builder.getData()

        fnum_mark1 = bisect.bisect(gps_times_mark1, t) - 1

        (pix, mask) = lidarPtsToPixels(data,
                                       imu_transforms_mark1[fnum_mark1, :, :],
                                       T_from_i_to_l, cam)

        intensity = data[mask, 3]
        heat_colors = heatColorMapFast(intensity, 0, 100)
    while not paramInit:
        time.sleep(1)

    print int(sys.argv[3])
    video_reader.setFrame(int(sys.argv[3]))
    (success, orig) = video_reader.getNextFrame()
    while True:
        I = orig.copy()
        fnum = video_reader.framenum
        print fnum
        T_from_l_to_i = np.eye(4)
        T_from_l_to_i[0:3,0:3] = R
        T_from_i_to_l = np.linalg.inv(T_from_l_to_i)
        t = gps_times_mark2[fnum]
        builder.start_time = t
        builder.end_time = t + 3.0 * 1e6
        builder.step_time = 0.5
        builder.T_from_l_to_i = T_from_l_to_i
        builder.T_from_i_to_l = T_from_i_to_l
        builder.buildMap(filters=['no-trees'])

        data, data_times = builder.getData()

        fnum_mark1 = bisect.bisect(gps_times_mark1, t) - 1

        (pix, mask) = lidarPtsToPixels(data,
                imu_transforms_mark1[fnum_mark1, :,:], T_from_i_to_l, cam)

        intensity = data[mask, 3]
        heat_colors = heatColorMapFast(intensity, 0, 100)
        for p in range(4):