Convert Multiple Videos to Multiple GIFs

What command will convert multiple video files to multiple GIFs? I use the following command to convert 1 video to GIF: ffmpeg -i input.flv -vf scale=320:-1 output.gif I assume I'll need a bash script or some command with loop. [This thread](https://superuser.com/questions/818017/convert-mutiple-gifs) is vaguely related to my question.