Avisynth Clips Wrong Size

[sambat]

Having a problem with Avisynth trying to select a clip, duplicating it (plus reversing) - and joining.

If I use this script to clip, duplicate and simply join the video, it works ok.

avisource("clip.avi")
part1=Trim(0,499)
part2=Trim(0,499)
alignedSplice(part1,part2)

If I try to reverse the second clip and join them, the first clip overruns from 0-754 and the second is truncated.

avisource("clip.avi")
part1=Trim(0,499)
part2=Trim(0,499).reverse()
alignedSplice(part1,part2)

[poisondeathray]

avisource("clip.avi")
part1=Trim(0,499)
part2=Trim(0,499).reverse()
alignedSplice(part1,part2)

you have to define the clip, trim doesn't refer to anything

e.g. this works ok
a=colorbars().showframenumber()
part1=a.trim(0,10)
part2=a.trim(0,10).reverse()
part1++part2

So I think this should work
a=avisource("clip.avi")
part1=a.Trim(0,499)
part2=a.Trim(0,499).reverse()
alignedSplice(part1,part2)

or even simplified
a=avisource("clip.avi").trim(0,499)
a++a.reverse()

[sambat]

God bless - It never crossed my mind.
Thank you.

[Gavino]

avisource("clip.avi")
part1=Trim(0,499)
part2=Trim(0,499).reverse()
alignedSplice(part1,part2)

you have to define the clip, trim doesn't refer to anything

Yes it does, it refers by default to 'last', which is the result of the AviSource().

Your proposed solution is also correct, but sambat's original script should have worked.

sambat, are you sure that was your complete script?
Is there something odd about your "clip.avi"?
Some formats behave oddly when seeking backwards, although this is not usually a problem with AviSource.

[sambat]

That was the complete script.
I'll repost later when I get a chance to try it again.

[sambat]

I retrieved my original script and I can't recreate the problem.

I had initially posted at VideoHelp;rebooted, went to get a cup of tea & almost immediately I got the email and tried the solution from poisondeathray a few minutes later.
I didn't bother going back to the original script - I had spent two frustrating hours with it - until now.