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shell script for streaming to twitch.tv
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#! /bin/bash | |
# from | |
# https://gist.github.com/3178130 | |
# gist created by brodul | |
# modified for http://twitch.tv/jplebreton | |
# originaly from http://tinyurl.com/twitch-linux from taladan | |
# www.youtube.com/user/taladan | |
# input and output video resolutions | |
INRES="1280x720" | |
OUTRES="640x360" | |
FPS="25" | |
# avconv presets - slow, medium, fast, faster, veryfast, superfast, ultrafast | |
# significant impact on stream quality! | |
# see all these in a terminal with "locate avpreset" | |
QUAL="veryfast" | |
# offsets from top left of screen to capture from | |
XOFF="128" | |
YOFF="128" | |
# how many cores your machine has - mine's quite wimpy! | |
CORES="2" | |
# audio offset from video must account for encode time | |
# use positive numbers if audio lags behind video | |
AUDIOOFFSET="00:00:01.00" | |
# audio sample rate | |
AUDIORATE="44100" | |
# mp3 encoder quality - 5 default, 7 faster | |
MP3QUAL="7" | |
# total bitrate of stream | |
BITRATE=768k | |
BUFSIZE=800k | |
# Write your key in a file named .twitch_key in your home directory | |
# This is your streamkey generated by jtv/twitch found at: http://www.justin.tv/broadcast/adv_other | |
STREAM_KEY=$(cat ~/.twitch_key) | |
avconv \ | |
-f x11grab -show_region 1 -s $INRES -r "$FPS" -i :0.0+"$XOFF","$YOFF" \ | |
-itsoffset "$AUDIOOFFSET" \ | |
-f pulse -sample_rate "$AUDIORATE" -ar "$AUDIORATE" -i default \ | |
-vcodec libx264 -s $OUTRES -preset "$QUAL" \ | |
-acodec libmp3lame -ar "$AUDIORATE" \ | |
-threads "$CORES" -vsync -1 -qscale "$MP3QUAL" \ | |
-b "$BITRATE" -bufsize "$BUFSIZE" \ | |
-f flv "rtmp://live.justin.tv/app/$STREAM_KEY" | |
# junk i commented out but want to keep around | |
#-f alsa -ac 2 -ar 44100 -i hw:0 \ |
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