Script to stream a ".webm" file to twitch.

stream.sh

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="" # use the terminal command Streaming streamkeyhere to stream your video to twitch or justin
FILE_NAME="$1" # file to stream
SERVER="live-fra" # twitch server in frankfurt, see http://bashtech.net/twitch/ingest.php for list

ffmpeg -i $FILE_NAME -f flv -ac 2 -ar $AUDIO_RATE \
    -vcodec libx264 -g $GOP -keyint_min $GOPMIN -b:v $CBR -minrate $CBR -maxrate $CBR -pix_fmt yuv420p\
    -preset $QUALITY -tune film -acodec libmp3lame -threads $THREADS -strict normal \
    -bufsize $CBR "rtmp://$SERVER.twitch.tv/app/$STREAM_KEY"