vlc media player rotates the video, but the quality is getting lost

[jraju]

Hi, I downloaded the VLC media player and tried to rotate the video. It was about 1 gb video taken in Samsung Galaxy grandneo. I copied the file which automatically changes the orientation from vertical to horizontal.
I am a user of VLC and got to know the rotate option in the Tools, Effects and in the video tab, selected 90 degrees. I got the desired result immediately. When i opened the video file, it started to play horizontally and on selecting rotate, it immediately transforms to vertical and started playing.
But some parts of the video ran smoothly with no loss of sound effect, but some random section of the videos only shows colour splashes moving without the image showing up.
How to correct this . Pl gurus

[DB83]

Firstly, I would play the entire video WITHOUT rotating it just to ensure that the distortion is not the result of the rotation.