Title: Stream live video using nginx Author: Solène Date: 26 August 2019 Tags: openbsd gaming nginx Description: This blog post is about a nginx rtmp module for turning your nginx server into a video streaming server. The official website of the project is located on github at: https://github.com/arut/nginx-rtmp-module/ I use it to stream video from my computer to my nginx server, then viewers can use `mpv rtmp://perso.pw/gaming` in order to view the video stream. But the nginx server will also relay to twitch for more scalability (and some people prefer viewing there for some reasons). The module will already be installed with nginx package since OpenBSD 6.6 (not already out at this time). There is no package for install the rtmp module before 6.6. On others operating systems, check for something like "nginx-rtmp" or "rtmp" in an nginx context. Install nginx on OpenBSD: pkg_add nginx Then, add the following to the file /etc/nginx/nginx.conf load_module modules/ngx_rtmp_module.so; rtmp { server { listen 1935; buflen 10s; live on; allow publish 176.32.212.34; allow publish 175.3.194.6; deny publish all; allow play all; record_path /htdocs/videos/; record_suffix %d-%b-%y_%Hh%M.flv; } } The previous configuration sample is a simple example allowing 172.32.212.34 and 175.3.194.6 to stream through nginx, and that will record the videos under /htdocs/videos/ (nginx is chrooted in /var/www). You can add the following line in the "application" block to relay the stream to your Twitch broadcasting server, using your API key. push rtmp://live-ams.twitch.tv/app/YOUR_API_KEY; I made a simple scripts generating thumbnails of the videos and generating a html index file. Every 10 minutes, a cron check if files have to be generated, make thumbnails for videos (tries at 05:30 of the video and then 00:03 if it doesn't work, to handle very small videos) and then create the html. The script checking for new stuff and starting html generation: #!/bin/sh do echo $file PIC=$(echo $file | sed 's/flv$/jpg/') if [ ! -f "$PIC" ] then ffmpeg -ss 00:05:30 -i "$file" -vframes 1 -q:v 2 "$PIC" if [ ! -f "$PIC" ] then ffmpeg -ss 00:00:03 -i "$file" -vframes 1 -q:v 2 "$PIC" if [ ! -f "$PIC" ] then echo "problem with $file" | mail user@my-tld.com fi fi fi done cd ~/dev/videos/ && sh html.sh This one makes the html: #!/bin/sh COUNT=0 <html> <body> <h1>Replays</h1> <table> EOF do if [ $COUNT -eq 0 ] then echo "<tr>" >> index.html INROW=1 fi COUNT=$(( COUNT + 1 )) SIZE=$(ls -lh $file | awk '{ print $5 }') PIC=$(echo $file | sed 's/flv$/jpg/') echo "<td><a href=\"$file\"><img src=\"$PIC\" width=320 height=240 /><br />$file ($SIZE)</a></td>" >> index.html if [ $COUNT -eq $PER_ROW ] then echo "</tr>" >> index.html COUNT=0 INROW=0 fi done then echo "</tr>" >> index.html fi </table> </body> </html> EOF