Twitch streaming via ffmpeg

ffmpeg_twitch.sh

 # https://wiki.archlinux.org/index.php/Streaming_to_twitch.tv
 
 streaming() {
     INRES="1920x1080" # input resolution
     OUTRES="1920x1080" # output resolution
     FPS="15" # target FPS
     GOP="30" # i-frame interval, should be double of FPS, 
     GOPMIN="15" # min i-frame interval, should be equal to fps, 
     THREADS="2" # max 6
     CBR="1000k" # constant bitrate (should be between 1000k - 3000k)
     QUALITY="ultrafast"  # one of the many FFMPEG preset
     AUDIO_RATE="44100"
     STREAM_KEY="$1" # use the terminal command Streaming streamkeyhere to stream your video to twitch or justin
     SERVER="live-fra" # twitch server in frankfurt, see http://bashtech.net/twitch/ingest.php for list
     
     ffmpeg -f x11grab -s "$INRES" -r "$FPS" -i :0.0 -f alsa -i pulse -f flv -ac 2 -ar $AUDIO_RATE \
       -vcodec libx264 -g $GOP -keyint_min $GOPMIN -b:v $CBR -minrate $CBR -maxrate $CBR -pix_fmt yuv420p\
       -s $OUTRES -preset $QUALITY -tune film -acodec libmp3lame -threads $THREADS -strict normal \
       -bufsize $CBR "rtmp://$SERVER.twitch.tv/app/$STREAM_KEY"
 }