I want to make a video with these parameters/codecs :

Complete name                : myvideo.avi
Format                       : AVI
Format/Info                  : Audio Video Interleave
Format/Family                : RIFF
File size                    : 17.1 MiB
PlayTime                     : 3mn 16s
Bit rate                     : 732 Kbps
StreamSize/String            : 274 KiB
Writing application          : MEncoder Sherpya-MinGW-20060312-4.1.0
Writing library              : MPlayer

Video #0
Codec                        : XviD
Codec/Family                 : MPEG-4V
Codec/Info                   : XviD project
Codec profile                : Simple Profile/Level 3
Codec settings, Packet bitst : No
Codec settings, BVOP         : No
Codec settings, QPel         : No
Codec settings, GMC          : 0
Codec settings, Matrix       : Default
PlayTime                     : 3mn 16s
Bit rate                     : 593 Kbps
Width                        : 320 pixels
Height                       : 240 pixels
Display Aspect ratio         : 4/3
Frame rate                   : 20.000 fps
Resolution                   : 8 bits
Chroma                       : 4:2:0
Interlacement                : Progressive
Bits/(Pixel*Frame)           : 0.386
StreamSize/String            : 13.9 MiB
Writing library              : XviD 1.1.0
Writing library/Date         : UTC 2005-11-22

Audio #0
Codec                        : MPEG-1 Audio layer 2
PlayTime                     : 3mn 16s
Bit rate mode                : CBR
Bit rate                     : 128 Kbps
Channel(s)                   : 2 channels
Sampling rate                : 44.1 KHz
Resolution                   : 16 bits
StreamSize/String            : 2.99 MiB

for the moment, I manage to have : 

Complete name                : toto.avi
Format                       : AVI
Format/Info                  : Audio Video Interleave
Format/Family                : RIFF
File size                    : 21.2 MiB
PlayTime                     : 4mn 36s
Bit rate                     : 642 Kbps
StreamSize/String            : 407 KiB
Writing application          : MEncoder 2:1.0~rc2-0ubuntu13+medibuntu1
Writing library              : MPlayer

Video #0
Codec                        : MPEG-4 Visual
Codec/Family                 : MPEG-4V
Codec profile                : Simple Profile/Level 1
Codec settings, Packet bitst : No
Codec settings, BVOP         : No
Codec settings, QPel         : No
Codec settings, GMC          : 0
Codec settings, Matrix       : Default
PlayTime                     : 4mn 36s
Bit rate                     : 502 Kbps
Width                        : 320 pixels
Height                       : 240 pixels
Display Aspect ratio         : 4/3
Frame rate                   : 20.000 fps
Resolution                   : 8 bits
Chroma                       : 4:2:0
Interlacement                : Progressive
Bits/(Pixel*Frame)           : 0.327
StreamSize/String            : 16.6 MiB
Writing library              : Lavc51.44.0

Audio #0
Codec                        : MPEG-1 Audio layer 3
Codec profile                : Joint stereo
PlayTime                     : 4mn 36s
Bit rate mode                : CBR
Bit rate                     : 128 Kbps
Channel(s)                   : 2 channels
Sampling rate                : 48.0 KHz
Resolution                   : 16 bits
StreamSize/String            : 4.23 MiB
Writing library              : LAME3.97