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So, I found a digg on converting flv (Google Video) files to other formats like AVI today...Alas...it was geared for Windows users 
. So, of course, I figured out how to do it painlessly in linux....actually more painless than in Windows.
First, get the ffmpeg CVS source:
svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
Then, compile it:
./configure; make; sudo make install
Then, run it like this:
ffmpeg -i video.flv -ab 56 -ar 22050 -b 500 -s 320x240 test.mpg
Where all that crap is:
-b bitrate: set the video bitrate in kbit/s (default = 200 kb/s)
-ab bitrate: set the audio bitrate in kbit/s (default = 64)
-ar sample rate: set the audio samplerate in Hz (default = 44100 Hz)
-s size: set frame size. The format is WxH (default 160x128)
This will convert your video.flv into a test.mpg!
If you need help, there`s a great resource RIGHT ON YOUR COMPUTER!
Type man ffmpeg.
