Have I got my pipes right when converting MPEG back to DV?

For example: for a 352x576 PAL (or 352x480 NTSC) XSVCD I have used the following MediaPipes to convert it back to DV:

File Browser
File Streamer
MPEG Decoder
Color Conversion
Add Borders: Top: 0, Bottom: 0, Left: 4, Right: 4
Scaler : High Quality scaling to PAL 720x576 or NTSC 720x480
QuickTime Encoder: DV - PAL or NTSC, Best Quality, PAL 25 or NTSC 29,97 fps

I then open the output file with QuickTime Pro and export it as a PAL or NTSC DV stream, import it to iMovie and combine it with the audio which is converted from the demuxed *.mp2 to 48 kHz 16 bit *.aif via iTunes.

Any Comments? Why must I use the Color Conversion pipe?

BTW, I noticed that this pipe crashes MediaPipe if the input file is not demuxed.