Filter just part of a file with AviSynth?

[Holonet]

Just that quick question is all... I have been reading documents on AviSynth, and I can't seem to find a mention of selecting part of a file (if it is possible). I just want to apply the tweak filter to only a section of the file. Is there an argument I can put in the code anywhere to do this, just like starting frame and ending frame?

[gadgetguy]

Use the Trim function to break the video into sections. Then apply the filter to the section you want, then reassemble.

[Soopafresh]

ApplyRange is a special case of Animate where start_args = end_args, and present in v2.51. It can be used when you want to apply a certain filter on certain range of frames of a clip. Another difference with Animate is that args can't contain a clip. Starting from v2.53 it supports audio, and start_frame can be equal to end_frame (such that only one frame is processed).

http://avisynth.org.ru/docs/english/corefilters/animate.htm

[Holonet]

Blast...I need to be more detailed when I read... Thanks very much.

[Alex_ander]

A=Trim(0, 1000)
B=Trim(1001,2000).Tweak(....)
C=Trim(2001,10000)#10000 here is the last frame
A++B++C

or

ApplyRange(0,1000,"Tweak",hue=-30,sat=1.2,bright=20,cont=0.9)
#0,1000 are start/end frames

[AlanHK]

I think this is neater.

Trim(0, 1000) ++\
Trim(1001,2000).Tweak(....) ++\
Trim(2001,0) #0 = last frame when at end of range


I do this a lot when filtering logos which fade in and out through a show.

[Alex_ander]

Thanks for the tip, Alan (always had to search for the last frame number).