Kevin Lawler wrote: > Hello, > > I'm looking for a command line program that will take in a video file > and put out the same file with a certain modification. The modification > I'm interested in has to do with brightness. Essentially, I want to > normalize the brightness over the length of the movie. Even if the > brightness goes up and down, I would like to find a consistent level, > say the average, and enforce that level over the entire video. > > I am recording objects which move, and as they move they reflect light > in different ways. Sometimes the orientation of the object causes extra > light to be reflected towards the camera. At other times the object > dampens the incoming light, and the picture becomes darker. The change > in brightness makes the video look unprofessional. I want to mitigate > this effect.
What do you use as a recording source? Several webcams have an option to completely disable AGC (Auto Gain Correction), which is the effect you're seeing. Then you would need no program. > I can guess how I might go about this if I were forced to write the > application on my own, but it sounds like something someone would've > already done, and I always like to reuse a good solution whenever I can. The best solution is to not have to fix the problem :-) -- Med venlig hilsen Christian Iversen
