Sounds like a pixel aspect ratio issue. If you shot 720x480 widescreen on the camcorder, the pixels are meant to be stretched a bit to fit widescreen.
But before se go any further, even more important is this -- what are you going to do NEXT with your rendered file from AE? Make a DVD? Make a quicktime movie to play on the computer? That stuff is important. Usually with AE, you start with the delivery specifications and work backwards.
You should also know that AE CS3 does NOT play nicely with mpeg video. If you plan to get fancier in your AE work in the future, I'd transcode video clips to to a different Media Container & Codec so that 1) AE behaves and 2) you preserve as much image quality as possible. Personally, I like quicktime movies in the Photo JPEG, PNG or Animation codecs for this.
I was just making a video to put on Facebook for my grandkids. I solved the problem by importing the first video
into A.E. and rendering it. That way they came out the same. Yes, I noticed that I didn't have that problem with
the first few videos that I did with a cheap camera that records in .mov format. So, now I know where to look further
with the pixel problem. I will see if I can change something on the good camera. I am not doing nothing serious with
A.E. Since I retired and have time on my hands, I am just trying different things. Thanks for the help.
You're welcome. Learning how to work AE well is one sure way to keep you out of the bars!