ApplyRange range in filter

[wonkey_monkey]

I'm writing a few plugins and using applyrange to only apply them to certain sections of video. This all works fine until I try to use a filter that needs to know how far into the section it is being applied (such as when applying a moving mask from another file).

PVideoFrame __stdcall selectivecolour::GetFrame(int n, IScriptEnvironment* env) {

My problem is that the variable n gives the frame number of the video, not of the section selected with ApplyRange. Is there a way of getting that information within the filter, or will I have to pass it in some other way?

I've previously made wrapper functions in AVS to actually split the video, but is there an easier way?

David

[IanB]

If you use the Trim/Splice model instead of ApplyRange, you will get the segment frame number....
A=Trim(0, 123)
B=Trim(124, 567).selectivecolour(... # global frame 124 will be local frame 0
C=Trim(568, 0)

A + B + C
...

The ApplyRange implementation is :-...
X=Last
Y=selectivecolour(... # global frame n will be local frame n

A=X.Trim(0, 123)
B=Y.Trim(124, 567)
C=X.Trim(568, 0)

A + B + C
...

The other option is to pass an offset parameter like is done for ShowTime/ShowSMPTE/ShowFrameNumber

[wonkey_monkey]

I think I'll go with an offset parameter, otherwise I'll be writing wrappers for every function and some of them have 18 parameters...

Thanks for the info.

David