Convert my mpeg to ts_video w/out encoding or transcoding

i like to use convertx to convert my dvd mpeg (tmpgenc) to video_ts files
if the mpeg is 4g and i selected dvd9, will convertx still transcode (slightly decrease in qua) the mpeg
basically, i just want to convert my mpeg files to video_ts files w/out any change in the file (no encoding/transcoding)

Of course it will, DVD is restricted version of mpeg2.

sorry for not being specific > i want to convert my mpeg2 file converted to video_ts file

if your original is mpeg2 then quality should not be changed marginally.
It can change however, as mpeg2 standard allows lot more variations on fileformat than DVD.