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26th May 2003, 16:14 | #1 | Link |
Registered User
Join Date: Sep 2002
Location: Germany
Posts: 352
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Feature Request
Hi,
i know, the following can easily be achieved with existing functions. But this is a request about speed improvement. I'd like to use filters only on certain regions of the video. for example if i have a video with borders (16:9 -> 4:3, TV-crop, ...) i'd like do something like Code:
crop(16,80,-16,-80) convolution3d() # or any other filter addborders(16,80,16,80) But i'd like to do that without having to do crop + addborders before and after. (Because i guess this is unnecessary timeconsuming) I could imagine that it's faster if there's a filter which selects only a region of the video (like crop) and passes this to any other filter. But the result would have to be the complete (uncropped) video. Maybe like this Code:
region(16,80,-16,80).convolution3d() bye, Malcolm |
27th May 2003, 00:00 | #3 | Link |
developer wannabe
Join Date: Nov 2001
Location: Brooklyn, NY
Posts: 1,211
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Crop does what you want: like WarpEnterprises said it works in-place. (That's why it's so "helpful" in finding pitch/width bugs.) There should be no need to add borders afterward, unless you're making a VCD or similar.
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