Streaming to Twitch using avconv (X11 and PulseAudio)

twitch.sh

#!/bin/sh

key=live_... # grab this from your Twitch account
url=rtmp://live.twitch.tv/app/$key

# I'm pulling from my second monitor (-i :0.1)
# at fifteen frames a second (-r 15).
#
# It has an sxga resolution that I'm scaling to 524x420.
#
# Mind that the width of the video has to be
# a multiple of 2, so I'm stretching it by one pixel.

# Also tossed in some bitrate bits that seem sane
# for my Internet connection
#
# video: 4 mbps max (-maxrate 4m)
# audio: 128 kbps (-b:a 128k)

# Practically everything else is compatibility voodoo.

avconv \
  -f x11grab -video_size sxga -r 15 -i :0.1 \
  -f pulse -i default \
  -c:v libx264 -vf scale=524:420 -maxrate 4m \
  -profile:v baseline -pix_fmt yuv420p \
  -c:a libmp3lame -b:a 128k \
  -ar 44100 \
  -f flv $url