[Libav-user] Convert MP4 1280x720 to MPG 1280x720

[Thomas H]

ffmpeg -i MyKitty.mp4 -vf scale=1280:720 -idct h264 -sameq -target
ntsc-dvd MyKitty.mpg

Input file:
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720, 944 kb/s, 30 fps, 30 tbr, 60 tbn, 60 tbc
Output file:
    Stream #0:0(und): Video: mpeg2video, yuv420p, 1280x720, q=2-31,
6000 kb/s, 90k tbn, 29.97 tbc

Output is not of the same quality.
I have a suspect it has something to do with the Video, but do not
know how to correct this.
I have been working on this for about a week and can not figure it out.

Regards
Thomas