Correct way to reuse a still filter ..

[smhk]

I'm filtering an image like this ..

filter = ...
pInput = PictureInput( ... )
pInput! --> filter
filter --> pOutput
pOutput.imageAvailableCallback = {image in
   DispatchQueue.main.async { ... }
}
pInput!.processImage(synchronously:true)

I want to reuse the filter and pipeline. I am just changing the input each time.

I have found that the following works:

pInput!.removeAllTargets()
pInput = PictureInput(image: ...next image )
pInput! --> filter
pOutput.imageAvailableCallback = {image in
   DispatchQueue.main.async { .. same as above .. }
pInput!.processImage(synchronously:true)

1. imageAvailableCallback definitely goes to nil each time. You have to reset it (to the same thing) each time. Am I doing something wrong?

2. It seems you do have to removeAllTargets from the input. This seems strange, since you're completely remaking input with pInput = PictureInput(image: ...next image ). (How would it even 'remember' what the target is?) Am I doing something wrong?

thanks !