Create an flv movie that is 320 wide by 240 high. For audio functionality ffmpeg needs to be compiled with the following parameters:
```bash
--enable-amr_nb
--enable-amr_nb-fixed
--enable-amr_wb
--enable-mp3lame
```
The snippet itself:
```bash
ffmpeg -i mymovie.avi -s 320x240 -ar 44100 -r 12 mymovie.flv
```