stream.sh

#!/bin/bash

ffmpeg \
    -f alsa -ac 2 -i hw:ALSA,0,0 \
    -stream_loop -1 -fflags +genpts -i "loop.flv" -vcodec copy -b:v 2500k \
    -acodec libmp3lame -ar 44100 -q:a 3 -b:a 128k -bufsize 1024 \
-f flv "rtsp://..."