Camera flashes and flickering lights in video

[kingjen]

Hi all,

I encountered two problems recently while shooting with Panasonic GH2.

1. Just a few days ago, I shoot a birthday party using GH2 with settings at 24p, iso auto and shutter speed @1/50. There are other cameras with flashes taking place too. When I view the footage, the camera flashes that appeared in the footage are very different from I normally see.
Any idea what causes this and how to eliminate.

http://www.youtube.com/watch?v=sRVPM0r16Yg

2. I noticed there is flickering light at the light bulb in the video. Again, GH2 with settings at 24p, iso auto and shutter speed @1/50. It does not happen in all the light bulbs. Again, any advice to eliminate.

http://www.youtube.com/watch?v=c9MpmiGRCMk

Many thanks.

 

[Jemhadar]

1. It's the CMOS sensor, read this article.
http://dvxuser.com/jason/CMOS-CCD/

2. Never experience this before.

Cheers!

 

[Bamboopictures]

Stick to 25fps when shooting in flourescent lighting.

 

[DXNMedia]

24fps runs at 60Hz clock. Our power lines are running 50Hz, so you see the flicker effects.
This is most prominent in non-tungsten based lights like florescent, HMI & most ballast based lamps.

Adjust your shutter speeds to compensate to a certain extend.