wanderer wrote on Jan 22
nd, 2013 at 8:41am:
Really good!!
That's what I had in mind.
I see it easy, many people calculate the speed of trains, planes ... by this method.
Digital video cameras are very accurate because, one small error would produce that one record of 1 hour, produce a longer or shorter film, few seconds more or few seconds less... but that does, not happen because the actual cameras are very accurate.
I think that this method is easy and accurate is good for the initial speed... only need: one camera, one tripod, one object with a measure known situated in the same plane (one cardboard box for example), much light, and one software.
The camera would be situated far, for decreasing the angle error.
You multiply the distance between two frames with the number of frames for second.
For extract more values with one film, you need knowledges of cinematic and dinamic or use "slinging simulator" (
http://slinging.org/forum/YaBB.pl?num=1358332946 )