deinterlace or not?

[jeo]

hi all!

the source to encode is Elvis (aloha from Hawai) and all frames(frame by frame) in vdubmod are like this:

too bad,no?
script from dvd-rb(no filters):
#------------------
# AVS File Created by DVD Rebuilder
# VOBID:01, CELLID:01
#------------------
LoadPlugin("C:\Arquivos de programas\DVD-RB\DGDecode.dll")
mpeg2source("D:\ELVIS\D2VAVS\V01.D2V")
trim(0,6837)
ConvertToYV12(interlaced=true)

if i use fielddeinterlace() after trim,i have this result:


now my doubts and questions:
all my tvs are interlaced,in next future i will get some progressive....
is needed to deinterlace or better is encode interlaced?
if the best choice is use fielddeinterlace i still need to use the (interlaced=true) in the colorspace convertion?(ConvertToYV12) for cce?
more:
do you see the thin bright line in the left just after each contrast? look the black border in the left and in the face of the child(little boy).
it happen in the whole movie where have high contrast.
what can i do to remove this thin bright line?

thanks for any clarification!

[jeo]

after tests with many sources..
no,encode interlaced or you loose details/quality watching in "normal" tvs(interlaced).