Conversion and aspect-ratio

[lodest]

1. When I play a file :
VLC.exe G:\DVD01\VIDEO_TS\VTS_01_1.VOB
the result is a vertically compressed movie

2. When I play the file with the appropriate option :
VLC.exe G:\DVD01\VIDEO_TS\VTS_01_1.VOB :aspect-ratio="16:9"
the result is perfect

3. When I want to CONVERT this file with the appropriate option :
VLC.exe G:\DVD01\VIDEO_TS\VTS_01_1.VOB :aspect-ratio="16:9" :sout=#transcode{vcodec=mpgv,acodec=mp2a,ab=192,channels=2,soverlay,venc=ffmpeg{qscale=4}}:duplicate{dst=std{access=file,mux=ts,dst="H:\DVD01\test.ts"}}
the result is a stretched movie

What do I wrong ?