Overlay/tracing a moving object

MRM Studios wrote on 9/17/2006, 7:53 PM
I am an avid Olympic Weightlifter and a high school strength coach. I have used Vegas Movie Studio (v.6.0) to study video of athletes and myself lifting weights with great results. The ability to easily slow the speed of the video is priceless to me.

One of the tools that I need to learn is the ability to overlay the movement path of the barbell through the entire exercise. It is valuable to see the bar's path throughout the exercise and its relationship to the body. I usually video from tripod setup directly to the side of the athlete.

So I need an easy way to trace the path of a moving object (i.e. the end of the barbell) from the video of the exercise and then make an overlay of the tracing. Right now, I can do it using 4 programs simultaneously by tracking every other frame manually and transfering that point into Paint. In Paint I make a Blue Screen overlay with a red or yellow line that tracks the end of the bar. (Click here for an example of what I am talking about.) It takes me about 30 minutes to track the bar per rep and a rep last about 2 seconds at most.

Can anyone help?

Do I need to further clarify what I need?

Comments

Chienworks wrote on 9/17/2006, 8:14 PM
I could do this quite easily in Sonic Foundry's old Viscosity program. It lets you open up a video file and draw on it frame by frame, copying overlays from one frame to the next with motion.

Sadly, they don't sell it anymore. Do a web search for "Jedor Viscosity". I've seen a few places offering a free version of it for download. Warning: it doesn't support DV files, so you'll have to export to some other format like uncompressed or Cinepak first.

You could also do a search for "rotoscoping". There are plenty of tools out there that handle this sort of thing.