How to blur a part of a video screen with VIRTUAL DUB (wipeout?)

[reggio]

Hello everyone, I hope to find myself in the right place (I say this because I am new to Virtualdub).


I have a video with a fixed shot, it is a kind of table with a kind of track that moves in a circle some items.
I would like to "cut out" and blur everything that is outside of the table (outside the red zone)


I enclose a picture of similar example to understand



Searching with google I found this explanation "VirtualDub" but unfortunately that filter blurs only rectangular shapes, while I have a more complex figure ...


Can you tell me / tell me how to do?


Thank you and see you soon!

[deadrats]

you could crop most of what is outside the table, that would probably be easier. or maybe re-shoot and this time frame the shot so only the table is on view.

otherwise, i'm sure some avisynth guru here has a script laying around someplace.

[manono]

Something like this?

A=ImageSource("Table.bmp")
B=A.AverageBlur(50)
Mask=ImageSource("Table1.bmp")
Overlay(A,B,0,0,Mask)

[reggio]

Something like this?

A=ImageSource("Table.bmp")
B=A.AverageBlur(50)
Mask=ImageSource("Table1.bmp")
Overlay(A,B,0,0,Mask)

Hi and thank you,
Yes, I need something like you've show, but applied on my film and not on a single picture: how I get this?

[manono]

Yes, I need something like you've show, but applied on my film and not on a single picture: how I get this?

The same way, just using the proper videosource rather than ImageSource. For example:


A=AVISource("video.avi")
B=A.AverageBlur(50)
Mask=ImageSource("Table1.bmp")
Overlay(A,B,0,0,Mask)


The source filter you use might depend on the kind of video it is. Doing it like that the blur will last as long as the video. AverageBlur is part of the VariableBlur filter.

[jagabo]

And it will only work if the area to be blurred isn't moving within the frame. If the camera is moving around it's a lot more work. You'll have to use an NLE and use motion tracking.