Make HLS playlist and fragment lengh changeable

Dockerfile

@@ -7,6 +7,8 @@ LABEL maintainer="oliver@traber-info.de"
 ENV DEBIAN_FRONTEND noninteractive
 ENV RTMP_PORT 1935
 ENV HTTP_PORT 8080
+ENV HLS_FRAGMENT_LENGTH 3
+ENV HLS_PLAYLIST_LENGTH 20
 
 # Update and install packages
 RUN apt update -y && \

README.md

@@ -38,6 +38,8 @@ If you want to make the web player and the HLS files available via HTTPS, you ca
 - `TLS_CERT` - File name of the TLS certificate file in the /cert directory inside the container. If set, encrypted ingest will be enabled on the RTMP port.
 - `TLS_KEY` - File name of the private key that belongs to the TLS certificate.
 - `STREAM_KEY` - Stream key, which is needed to ingest stream data. If the variable is not set, the key is randomly generated at container startup.
+- `HLS_FRAGMENT_LENGTH` - Length of one HLS fragment in seconds. Defaults to `3`.
+- `HLS_PLAYLIST_LENGTH` - Length of the HLS playlist in seconds. Defaults to `20`.
 
 ## Built with
 - [NGINX](https://www.nginx.com/) High Performance Load Balancer, Web Server, & Reverse Proxy

config/nginx-ssl.conf.skel

@@ -73,8 +73,8 @@ rtmp {
             # Turn on HLS
             hls on;
             hls_path /var/www/html/hls/;
-            hls_fragment 3;
-            hls_playlist_length 20;
+            hls_fragment {HLS_FRAGMENT_LENGTH};
+            hls_playlist_length {HLS_PLAYLIST_LENGTH};
         }
     }
 }

config/nginx.conf.skel

@@ -60,8 +60,8 @@ rtmp {
             # Turn on HLS
             hls on;
             hls_path /var/www/html/hls/;
-            hls_fragment 3;
-            hls_playlist_length 20;
+            hls_fragment {HLS_FRAGMENT_LENGTH};
+            hls_playlist_length {HLS_PLAYLIST_LENGTH};
         }
     }
 }

entrypoint

@@ -26,6 +26,8 @@ if [ ! -f /setup.lock ]; then
     sed -i "s/{RTMP_PORT}/$RTMP_PORT/g" /etc/nginx/nginx.conf
     sed -i "s/{STREAM_KEY}/$VALID_STREAM_KEY/g" /etc/nginx/nginx.conf
     sed -i "s/{HTTP_PORT}/$HTTP_PORT/g" /etc/nginx/nginx.conf
+    sed -i "s/{HLS_FRAGMENT_LENGTH}/$HLS_FRAGMENT_LENGTH/g" /etc/nginx/nginx.conf
+    sed -i "s/{HLS_PLAYLIST_LENGTH}/$HLS_PLAYLIST_LENGTH/g" /etc/nginx/nginx.conf
 
     # Touch setup lock
     touch /setup.lock