[MEncoder-users] video size

[Andrew Collington]

Hi,

I'm just getting to grips with mencoder (and ffmpeg) and have a bit of 
an issues.  When I join a 4.8MB .mov file and a 60K .mp4 video, it turns 
out to be a 10MB file!  Any reason for this giant leap in file size?  
Looking at the details with ffmpeg, this is what the two files look like:

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'lc-intro-320x240.mp4':
  Duration: 00:00:03.0, start: 0.000000, bitrate: 157 kb/s
  Stream #0.0(und): Video: mpeg4, yuv420p, 320x240, 25.00 fps(r)
  Stream #0.1(und): Audio: aac, 44100 Hz, stereo

Seems that stream 1 comes from film source: 749.00 (1498/2) -> 15.00 (15/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '4-1156708550931399.mov':
  Duration: 00:02:10.6, start: 0.000000, bitrate: 295 kb/s
  Stream #0.0(eng): Audio: qdm2, 22050 Hz, stereo
  Stream #0.1(eng): Video: svq3, yuv420p, 320x240, 15.00 fps(r)

and the output is:

Input #0, avi, from 'output.avi':
  Duration: 00:02:12.6, start: 0.000000, bitrate: 619 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 320x240, 25.00 fps(r)
  Stream #0.1: Audio: aac, 44100 Hz, stereo, 87 kb/s

The command I'm using is:

mencoder lc-intro-320x240.mp4 4-1156708550931399.mov -o output.avi -oac 
lavc -ovc lavc -lavcopts     
vcodec=mpeg4:mbd=2:trell:v4mv:turbo:autoaspect:acodec=aac:abitrate=192

Any way I can optimize this to have it more along the file size of the 
second input file (the 4.8MB file)?

Many thanks!!

Andy