How I can put text on the streaming with ffmpeg?

[hakursa]

Hello, I stream with this command with ffmpeg:
ffmpeg -re -i "http://CDN12_eu.sababatv.com:80/C18/smil:C18.smil/playlist.m3u8?token=d0b7bcc5-3c6b-46b3-9118-67a436fdefbb" -framerate 25 -vcodec h264 -video_size 720x480 -c:v libx264 -preset veryfast -maxrate 1000k -bufsize 2548k -pix_fmt yuv420p -c:a libmp3lame -b:a 96k -ar 44100 -f flv "rtmp://cdn.pubzony.com/stream/exampled?key=db6c5424&id=3055"

My question is if someone can join to this code the command to put a line of white text and black shadow on the center-top of the screen?

If someone can send the new code with this command inside (you can write in text: test test test test and I'll change it by myself), I'll be really thankful.

Thanks.