can the signal coming from the av jack be modified from 4:3 to 16:9?

Where can I install them?

Are there any CAD software which can be used on Raspbian for the Pi2?

Thanks to all. I solved the problem, now I see the video and I ear the audio, but the picture is in black/white however I have a Color Tv... why?

How cany I verify it?

i have a RPi2, I want to join it with an old scart tv. I have the 3.5 mm jack to av adapter and the av to scart adapter, but when I connect all and I give alimentation it simply doesn?t work, why? How can I solve this problem?