is it bad to ivtc a source that might not need it?

[Amateur]

i am encoding avatar the last airbender cartoon. book 1 volume 2 is strange though. the beginning is telecined up until it tells me the name of the episode, then it becomes progressive. if i treat the source as progressive, the the beginning looks funny so i'm wondering if i will destroy the episode if i ivtc even if it's progressive?

if anyone also wants to help me out with a great looking script that would be nice too. so far i have the following. wondering if i can improve compressibility at all.

30 second clip (shows part of beginning and part of the episode to see what i'm talking about) - http://www.mediafire.com/?14i4x1apdftad85


my script
LoadPlugin("C:\Program Files (x86)\MeGUI\tools\dgindex\DGDecode.dll")
DGDecode_mpeg2source("E:\DVDs\Avatar Last Airbender\b1v2e1\VTS_03_1.d2v", cpu=4, info=3)
LoadPlugin("C:\Program Files (x86)\MeGUI\tools\avisynth_plugin\ColorMatrix.dll")
ColorMatrix(hints=true, threads=0)

Spline36Resize(last.width*2,last.height*2)
aWarpSharp2(thresh=160, blur=3, type=0, depth=16, chroma=4)
aWarpSharp2(thresh=160, blur=3, type=0, depth=8, chroma=4)
Spline36Resize(last.width/2,last.height/2)

crop( 8, 0, -6, -2)
LanczosResize(640,480)

removegrain(mode=1)
dfttest()
saa()
unsharpmask(70,3,0)

tweak(sat=1.15).ColorYUV(levels="tv->pc",off_y=-3,gamma_y=-10)

[Blue_MiSfit]

1) Why are you adjusting TV to PC levels? This makes no sense unless you're targeting a device that expects this

2) Yes, trying to perform IVTC on progressive content is a terrible idea :) It sounds like this content is hybrid. In this case, you can IVTC the beginning and leave the rest as-is and use a timecodes file during the encode / mux to make a VFR MKV file.

Derek

[Amateur]

for the tv to pc that was suggested by someone else to enhance the colors. it seemed to work pretty well. since i play my files from a computer and will eventually have an lcd or led tv i figured it made sense. should i not have that and just adjust the saturation for better colors?

how would i add the timestamp to my script to just ivtc a specified range of frames?

and what filter would get rid of such distortion? (the cape and hands)

http://i52.tinypic.com/1zb5w05.jpg

i can get rid of a lot of it with LOTS of bitrate but i'm hoping that's not the only solution.