twitch-stream.sh

#!/bin/sh

CONFIG_FILE="$HOME/.config/twitchstreamrc"

if ! [ -f "$CONFIG_FILE" ]; then
  echo "Missing configuration file ('$CONFIG_FILE')" 1>&2
  exit 1
fi

. "$CONFIG_FILE"

GOP=$(( $FPS * 2 ))
GOPMIN=$FPS

THREAD_PARAMS=""
if [ -n "$THREADS" ]; then
  THREAD_PARAMS="-threads \"$THREADS\""
fi

stream_fifo='/tmp/twitch-stream-fifo' 
if ! [ -e "$stream_fifo" ]; then
  mkfifo "$stream_fifo" || exit 1
fi

ffmpeg \
  -f x11grab \
  -video_size "$INRES" \
  -framerate "$FPS" \
  -i :0.0 \
  -f pulse \
  -i default \
  -f flv \
  -vcodec libx264 \
  -pix_fmt +yuv420p \
  -g "$GOP" \
  -keyint_min "$GOPMIN" \
  -b:v "$VIDEO_BITRATE" \
  -bufsize "$VIDEO_BITRATE" \
  -minrate "$VIDEO_BITRATE" \
  -maxrate "$VIDEO_BITRATE" \
  -s "$OUTRES" \
  -preset "$QUALITY" \
  -tune film \
  -acodec aac \
  -ac 2 \
  -ar "$AUDIO_SAMPLE_RATE" \
  -b:a "$AUDIO_BITRATE" \
  $THREAD_PARAMS \
  -strict experimental \
  "rtmp://$SERVER.twitch.tv/app/$STREAM_KEY"

twitchstreamrc

# input resolution
INRES=1920x1080

# output resolution
OUTRES=1920x1080

# target FPS
FPS=60

# number of threads (empty for automatic)
THREADS=

# constant bitrate (should be between 1000k - 3000k)
VIDEO_BITRATE=2500k

# one of the many FFMPEG preset
QUALITY=veryfast

# audio sampling rate
AUDIO_SAMPLE_RATE=48000

# audio bitrate
AUDIO_BITRATE=160k

# use the terminal command Streaming streamkeyhere to stream your video to twitch or justin
STREAM_KEY='your_key'

# twitch server in frankfurt, see http://bashtech.net/twitch/ingest.php for list
SERVER=live