Hi, I want to use a function that is likely to create a mask. I can do this manually, like this : src=AVISource("...") ALL=crop(0,0,0,0) mask=src.mt_lutspa(relative = false, expr = "y 108.2 < y 480 < y 374.5 > &

If you just want to process only a rectangle area, check .

Thanks. Could you give an example of use then ? Moreover, would you know another filter to process a circular area or a any other interesting shape ?

Probably be faster and easier to create the "interesting shape" mask in your image program (gimp, photoshop etc...)

I'm not totally understanding you. How could I mix into my avisynth script below a given shape created with an image program ? Again it would be nice to have an example.

For quadratura: Code:

Yes cretindesalpes (in passing, funny nickaname) ; quadratura : then the blur will only be applied on the 50 50 100 100 section, won't it ? for the mask : well in fact it is not what I would like to do. Imagine I have a video with different frames in the same picture and which are not static, like that for example . Below I used this : mask=src.mt_lutspa(relative = false, expr = "y 108.2 < y 480 < y 374.5 > &

I'm sorry to come back to this thread again but cretindesalpes suggested a code above to use a personnal shape as a mask (mask.png) but how am I supposed to create such a shape ? Let's say I want to make a heart for example ; can you create such a shape via Photoshop or any similar program ? Imagine I would like to process a 1000x1000 frame and that I use the heart, its dimensions being 300x300 for example, and I want to process ALL the part covered by the heart but anything out of it. I will use this code then : flt = Blur (1) mask = ImageSource ("mask.png", end=FrameCount()-1).ConvertToYV12 () mt_merge (src, flt, mask, luma=true) Then everyhting INSIDE the shape will be blurred. But the question is the one I mentionned before : how to create a "mask" ? I know I could draw something on Gimp or something like that but I don't know if that would be a mask. Well I know it's confusing...

Yes, draw the shape in Gimp or a similar program. All white for the processed parts, and all black for the masked parts.

Ok, in fact it is simple, thank you. Then do you think there is a possibility to create a mask in order to process only luma or chroma while denoising with a denoiser ? This is in echo to my "Luma Chroma Denoise" post. I know such a question is somewhat hazy but, as far as I know, such a mask would consist in only selecting some kind of frequencies.