Everything began when I experimented in the video mode of the bright bars purple and white with my camera Panasonic FZ35/38. I found very good elements of answers on the forum of DP Review.
The forum messages that help me are there: “FZ35/38 video experiences: severe glare problems.
Here the link for the first post: forums.dpreview.com/forums/read.asp?forum=1033&message=33114322
and maybe the solution: forums.dpreview.com/forums/read.asp?forum=1033&message=33313093
So I bought the Panasonic filter DMW-LN46 (a neutral density filter – nd8). This ND filter reduces the amount of incoming light by 1/8 th without affecting color balance.
I take my FZ35 to outdoor on a sunny day near a river. I shot whit and whitout that filter. That was a succes for me! About 90% of improvement. I took my SDCard and put the video clips on Sony Vegas Studio Platinum 9. I made a little film. I hope that will help you if you have some glare problem.
The video of my film: WITH AND WITHOUT PANASONIC FILTER is here on Vimeo: