VLP-16 pointcloud data has angular gap in RVIZ !!

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Hi everyone! I am using VLP-16 and ros for SLAM.

When I see the captured pcap file in VeloView I can see the scans correctly. But when I try to publish it on Rviz, in each scan part of the data(from specific angle for around 30 degree) are lost. In each scan the angle of lost points changes. I also tried to save the scan in other program and realized that the saved point cloud also have the same gap. The rotation speed of velodyne was 600 rpm. I am using ros-indigo and for showing data in rviz I am using following commands:

rviz -f velodyne

roslaunch velodyne_pointcloud VLP16_points.launch calibration:="VLP-16.yaml"

rosrun velodyne_driver velodyne_node _model:=VLP16 _pcap:=./velodyne_scan.pcap _read_once:=true

Here is the video of my scan in rviz.

https://youtu.be/cNrVzr3vcFk

Can someone tell me how to fix this problem. Thanks in advance.