YJL

1   Justin.tv

On Justin.tv you can grab the stream key in channel info page¹, scroll down for Stream Key.

I am not going to bore you, so here is the script I am currently using:

#!/bin/bash
# 2011-09-06T06:45:42Z

VIDEO_SIZE="630x352"
FPS="15"

STREAM_KEY="<INSERT YOU KEY HERE>"
STREAM_URL="rtmp://live.justin.tv/app/$STREAM_KEY"


/path/to/x11grabr/x11grabr -s "$VIDEO_SIZE" -r "$FPS" -bnone |
ffmpeg -f rawvideo -pix_fmt bgra -s "$VIDEO_SIZE" -r "$FPS" -i - \
       -f alsa -ac 1 -ar 11025 -i pulse \
       -vcodec libx264 -vpre baseline \
       -acodec libmp3lame -ab 32k \
       -threads 0 \
       -f flv "$STREAM_URL"
       #-f alsa -ac 2 -ar 22050 -i pulse \
       #-acodec pcm_s16le \
       #-acodec libmp3lame -ab 64k \
       #-acodec aac -strict experimental -ab 64k \
       #-acodec aac -strict experimental \

I use 630x352 because it gives me pixel-to-pixel when viewing on Justin.tv. I broadcast my desktop, so I dont like the image to be re-scaled. Also, you might want to use built-in x11grab in ffmpeg. So you may need to launch ffmpeg like (untested):

ffmpeg -f x11grab -pix_fmt bgra -s "$VIDEO_SIZE" -r "$FPS" -i :0.0 \
       # the rest of stuff

Note that I have submitted two patches, once they get released you would have better control.

servers = (
  {
    address = "livibetter.jtvirc.com";
    chatnet = "jtvme";
    port = "6667";
    password = "<YOUR JTV PASSWORD>";
    use_ssl = "no";
    ssl_verify = "no";
  }
);

chatnets = {
  jtvme = { type = "IRC"; };
};

channels = (
  { name = "#livibetter"; chatnet = "jtvme"; autojoin = "yes"; },
);

2   Ustream

As for Ustream, you need to download the FME XML file, search for <stream>, the string inside is your STREAM_KEY.

#!/bin/bash

# Go Live -> Start Broadcasting

VIDEO_SIZE="hd480"
FPS="15"

STREAM_KEY="<INSERT YOU KEY HERE>"
# flashver part is important
STREAM_URL="rtmp://1.486020.fme.ustream.tv/ustreamVideo/486020/$STREAM_KEY flashver=FMLE/3.0\20(compatible;\20FMSc/1.0)"

/path/to/x11grabr/x11grabr -s "$VIDEO_SIZE" -r "$FPS" -bnone |
ffmpeg -f rawvideo -pix_fmt bgra -s "$VIDEO_SIZE" -r "$FPS" -i - \
       -f alsa -ac 2 -ar 22050 -i pulse \
       -vcodec libx264 -vpre baseline \
       -acodec libmp3lame -ab 48k \
       -f flv "$STREAM_URL"
       # can use flv as well
       # -vcodec flv \
       #-b 1000 -vframes 500 \
       # -threads 0 \
       #-f alsa -ac 2 -ar 22050 -i pulse \
       # -acodec pcm_s16le \
       #-acodec libmp3lame -ab 32k \
       #-acodec libmp3lame -ab 64k \
       #-acodec aac -strict experimental -ab 64k \
       #-acodec aac -strict experimental -ab 32k \
       #-acodec aac -strict experimental \

3   Notes

I dont like broadcasting on Ustream, because it requires you to click on Start Broadcasting on the website and you need to keep the Flash on. Which we Linux users all know, Flash has not-so-good performance. If you know how to bypass it, please leave a comment. However, it has nice beginner controls of your stream, I think you can put on overlay text by using it.

And be careful for your stream key, ffmpeg might print out that URL, which would include your key. I think your can lower your log level, but I dont want to do that, read ffmpeg(1) if you need to.