Filtering a given frame range

[acro29]

I want to apply a blur fillter (Blur) to video.
The problem is I have a scene between the 960~2500 frames I do not want to blur...
How do I tell the fillter to ignore those frames?
I think it should be something like this:

from frame 0 to 960 apply blur
from frame 2500 till the last frame aplly blur.

now how do I exectute this, and is it even possible?

Cheers.

[Gavino]

Check out the ApplyRange (http://avisynth.org/mediawiki/ApplyRange) filter.

[J_Darnley]

a = Trim(0,960).Blur()
b = Trim(961, 2500)
c = Trim(2501, 0).Blur()
a ++ b ++ c

[acro29]

Thanks, seems to be working just fine Darnley.

Why is the a,b,c needed if I may ask. (I am still newbie)

And how does this works, Trim is used to exclude frames... the '.' tells the Trim to act diffrently then ?

[DarkT]

http://avisynth.org/stickboy/
--->RemapFrames
--->ReplaceFramesSimple(Filter1.Filter2.Filter3, mappings="[FrameNumberBegin FrameNumberEnd]")

[[P]ako]

You don't need the a, b, c. You can just do:

trim(0,960).Blur() \
++ trim(961,2500) \
++ trim(2501,0).Blur()

The "dot" tells the next filter (Blur) to work on the result of the previous filter (Trim).

[Prettz]

A style I always use when I have different filter chains I want to apply to different parts of a video is like this:

src = last
a = src.SomeFilter()
b = src.SomeFilter().SomeOtherFilter()
c = src.AnotherFilter()

a.Trim(###,###) ++ b.Trim(###,###) ++ a.Trim(###,###) ++ c.Trim(###,###) ++ a.Trim(###,###) ++ ...

This is very nice when you have a whole lot of different segments that get special filtering different from your "main" filter chain.

[acro29]

I understang the dot Thanks, but what about the Trim function.

If I understand it corectly it used to 'Exclude' frames from the video. How does it work in this case, it doesnt Exclude them' but define them as frame range.

[Comatose]

Trim creates a clip from the frame range you define, f.e. Trim(1000,1999) creates a clip composed of frames 1000-1999 from the last clip.

So:
zeroto960=trim(0,960).blur()
middle=trim(961,2499)
_2500toend=trim(2500,0).blur()
zeroto960+middle+2500toend

or:
#trim(0,960).blur()+trim(961,2499)+trim(2500,0).blur()
trim(0,960).blur() \
+trim(961,2499) \
+trim(2500,0).blur()

or, another alternative (DarkT's suggestion, and also my favorite):
(load RemapFrames.dll)
ReplaceFramesSimple(blur(), mappings="[0 960] [2500 35000]")
(assume that frame 35000 is the end frame. you can't use 0 here to tell it to continue all the way to the end)