Different aspect ratios with picture-in-picture
I have two video files, one is 16:9, the other 4:3. I would like to have the 4:3 video show as a picture in picture in the 16:9 video. Is there way do to this without having black bars on sides of the 4:3 video? That is, can I have one video clip remain in the full 4:3 within the 16:9 video?