Malcolm
26th May 2003, 16:14
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
crop(16,80,-16,-80)
convolution3d()
# or any other filter
addborders(16,80,16,80)
(because filtering is only necessary in parts that are not black)
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
region(16,80,-16,80).convolution3d()
I hope such a filter would bring a certain speed improvement over crop + addborders.
bye,
Malcolm
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
crop(16,80,-16,-80)
convolution3d()
# or any other filter
addborders(16,80,16,80)
(because filtering is only necessary in parts that are not black)
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
region(16,80,-16,80).convolution3d()
I hope such a filter would bring a certain speed improvement over crop + addborders.
bye,
Malcolm