Messing around with screen capture -> http(hls)

README.md

Screen Capture -> HTTP(HLS)

Rubble from my attempt to do an impromptu screen-share to chrome on my google-tv for my kids.

Doesn't work, but I think it might be kind of close.

Links:

• https://groups.google.com/forum/#!topic/nginx-rtmp/30rYody62D8
• https://github.com/arut/nginx-rtmp-module/blob/master/ngx_rtmp_relay_module.c
• http://www.videolan.org/doc/streaming-howto/en/ch04.html
• http://pkula.blogspot.com/2013/06/live-video-stream-from-raspberry-pi.html
• https://github.com/arut/nginx-rtmp-module
• http://jorgenpt.tumblr.com/post/21484803576/livecasting-osx-desktop
• http://superuser.com/questions/164892/screen-capture-command-line

capture-screen.sh

#!/bin/bash

# also tried: VLC -> fifo -> ffmpeg(transcode to x264) -> RTMP -> NGINX, but didn't work for me
# FIFO=/tmp/screen-capture.raw
# mkfifo $FIFO

VLC=/Applications/VLC.app/Contents/MacOS/VLC
# FFMPEG=`which ffmpeg`
PIDFILE=/tmp/screen-capture-vlc.pid

on_die () {
    # kill all children
    kill -9 `cat $PIDFILE`
}

trap 'on_die' TERM

$VLC --intf dummy screen:// \
     --screen-fps "30" \
     --screen-caching 100 \
     --sout file/muxer:- \
     --ttl 1 \
     --pidfile $PIDFILE \
     --sout-keep

wait

nginx.conf

user  nobody;
worker_processes  1;

error_log  logs/error.log;
error_log  logs/error.log  notice;
error_log  logs/error.log  info;

pid        logs/nginx.pid;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                     '$status $body_bytes_sent "$http_referer" '
                     '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    keepalive_timeout  65;

    server {
        listen       9999;
        server_name  localhost;
        access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        location /stat {
            rtmp_stat all;
            rtmp_stat_stylesheet stat.xsl;
        }

        location /stat.xsl {
            root /usr/local/Cellar/nginx-rtmp-module/HEAD;
        }

        location /control {
            rtmp_control all;
        }

        location /hls {
            types {
                application/vnd.apple.mpegurl m3u8;
                video/mp2t ts;
            }

            root /tmp;
            add_header Cache-control no-cache;
        }
    }
}

rtmp {
    server {
        listen 1935;
        #chunk_size 8192;
        ping 30s;
        notify_method get;

        application live {
            live on;
            hls on;
            hls_path /tmp/hls;
            hls_sync 100ms;
            hls_continuous on;

            #This will start/stop our ffmpeg script and camera stream (thanks #towolf)
            exec_static /usr/local/etc/nginx/capture-screen.sh;
            exec_kill_signal term;
        }
    }
}