sudo sysctl fs.pipe-max-size=1048576
sudo rm /home/pi/temp_audio.v
sudo rm /home/pi/temp_video.h264
mkfifo /home/pi/temp_audio.v
mkfifo /home/pi/temp_video.h264
/usr/bin/arecord -Dmic_sv -c2 -r48000 -fS32_LE -twav /home/pi/temp_audio.v &
/usr/bin/raspivid -w 640 -h 480 -v -fps 10 -b 500000 -o /home/pi/temp_video.h264 -t 0 &
timeout 240 /home/pi/special/ffmpeg/ffmpeg \
    -framerate 10 \
    -i /home/pi/temp_video.h264 \
    -i /home/pi/temp_audio.v \
    -ab 24k \
    -c:v copy \
    -c:a aac \
    -report \
    -f flv rtmp://209.85.230.23/live2/KEY