Abnormal bitrate and quality drop

[jpsdr]

I may have an idea... Are you able to provide a source which trig the issue creating a file like this :
You choose a small part where the scene change trig the issue, the sample will have 3 scenes, so 2 change scene :
[Scene 1][Scene 2][Scene 3]. The issue is trigged between scene 2 and Scene 3.
You create an avs script like this (i'm assuming input file is an avi file in lossless codec) :

a = AviSource("Small_Sample.avi").trim(0,xxxx)
b = AviSource("Small_Sample.avi").trim(xxxx+1,0)
a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+a+b

xxxxx/xxxx+1 : The frame number of the scene change between Scene 1 and Scene 2. So a will have only [Scene 1], and b will have [Scen2][Scene3}.
Put enough "a" to finaly be able to trig the issue at the end of the file.
Will that trick enable you to provide a trigged sample, without having to provode the whole file (which is of course totaly not possible) ?