$ ffmpeg -i src/5-177.mpg -f mpeg2video -aspect 16:9 -s 320x240 -b 2000k -y out.mpg 

--- snip --- 

$ idvid out.mpg
--------------------------------
idvid
Video identification script
Part of the tovid suite, version 0.30
http://www.tovid.org
--------------------------------
Analyzing file: 'out.mpg'. This may take several minutes...
=========================================================
               File: out.mpg
              Width: 320 pixels
             Height: 240 pixels
       Aspect ratio: 1.77:1
             Frames: 0
           Duration: 00:00:12 hours/mins/secs
          Framerate: 29.970 frames per second
       Video format: MPEG2