Question:

While playing back the video captured on Super slow motion, the video screen twinkles and black lines appear and the line�s bandwidth is also different. Why is this?

Answer:

Streaks on Super slow motion video are caused by flicker of light source.

As Super slow motion use very fast shutter speed, a flash of light that is invisible to the human being is recorded on the camera and it appears in the shape of a line in the characteristics of the camera(CMOS) sensor.

When using Super slow motion under a flash light source, the line appears differently according to the shooting direction of the camera.

For example when you place the phone vertically, flashing line appears vertically.

In case bandwidth of line, it is influenced by the flicker frequency of the light source.

Usual light source flashes at 120Hz  and there are various light source with different frequency.

In this case bandwidth of streaks is shown differently.