making a shortcut for an avisynth command

[pooksahib]

Hi. I often use this command at the beginning of a scene edit:

loop(250,9999,9999).trim(9999,9999+249).amplify(0).fadein0(25)

Is it possible to make a 'function' of the loop part so that I can simplify my scripts something like this:

rpt(999,250,25)

meaning, repeat frame 999 250 times with a 25 frame fadein. If possible, 'Amplify(0)' would be incorporated into the function.

Grateful thanks for any thoughts you may have.

[abolibibelot]

You may eventually get a relevant reply here, but you might get more in-depth replies at Doom9, which has an entire section dedicated to Avisynth.

[pooksahib]

Thanks, abolibibelot. I've been trying to get my head around functions by reading this page:
http://avisynth.nl/index.php/User_defined_script_functions
but it's proving to be beyond someone like myself who came to computers later in life. I'll hang around here for a while as I've had enormous help from members of this forum in the past.

[Selur]

assuming I didn't overlook something:

function rpt(clip input, int frame, int times, int fadeIn)  
{
   clip = clip.loop(times,frame,frame).trim(frame,frame+times-1).amplify(0).fadein0(fadeIn)
   return clip
}

should do the trick.

Cu Selur

[pooksahib]

Hallo, Selur und Vielen Dank for that. Very kind of you to take the time. I've tried using

rpt(999,250,25)

on an existing script but I get an error message saying the video stream cannot be opened. Am I 'calling' the function correctly?

[jagabo]

fixed:

function rpt(clip input, int frame, int times, int fadeIn)  
{
    input.loop(times,frame,frame).trim(frame,frame+times-1).amplify(0).fadein0(fadeIn)
}

[pooksahib]

Superb, jagabo, thank you so much. It looks simple but I just can't 'read' that programming. I did, however, write a function to do a loop with a fadeOUT. That was easy...

Thanks again, and to you, too, Selur.

[Selur]

doh overlooked that I renamed the clip to input so

function rpt(clip input, int frame, int times, int fadeIn)  
{
   input =  input.loop(times,frame,frame).trim(frame,frame+times-1).amplify(0).fadein0(fadeIn)
   return input
}

also should work.