[FFmpeg-user] 1) Windows Cmd Line to convert to Mpeg-2 (ts) - not Mpeg-2 (ps)? 2) Please correct errors

[M el]

1 - Using a Windows PC (xp pro) what is the command line for
converting Video1.avs to Video1.mpg
... where Video1.mpg will be a Mpeg-2 (ts) format?

2 - And what is wrong with the command line below that converts to
Mpeg-2 (ps) ??

c:\utilities\ffmpeg\ffmpeg -i video1.avi -vcodec mpeg2video -b 400k -s
620x480 -aspect 4:3 -acodec mp2 -ab 128k -ar 22050 video1.mpg

I get two error messages...

a - Incompatible pixel format 'bgra' for codec 'mpeg2video',
auto-selecting format ' yuv420p'
b - [mpeg @ 01EF5E20] VBV buffer size not set, muxing may fail

How can I correct the command line to fix these?