Experimental HLS support.

src/modules/octopi/config

@@ -21,6 +21,9 @@
 [ -n "$OCTOPI_MJPGSTREAMER_REPO_DEPTH" ] || OCTOPI_MJPGSTREAMER_REPO_DEPTH=1
 [ -n "$OCTOPI_INCLUDE_MJPGSTREAMER" ] || OCTOPI_INCLUDE_MJPGSTREAMER=yes
 
+# FFMPEG HLS
+[ -n "$OCTOPI_INCLUDE_FFMPEG_HLS" ] || OCTOPI_INCLUDE_FFMPEG_HLS=yes
+
 # HAProxy
 [ -n "$OCTOPI_INCLUDE_HAPROXY" ] || OCTOPI_INCLUDE_HAPROXY=yes
 

src/modules/octopi/filesystem/boot/octopi.txt

@@ -72,3 +72,11 @@
 #
 #camera_http_webroot="./www-octopi"
 #camera_http_options="-n"
+
+### EXPERIMENTAL
+# Support for different streamer types.
+#
+# Available options:
+#   mjpeg [default] - stable MJPG-streamer
+#   hls - experimental FFMPEG HLS streamer
+#camera_streamer=mjpeg

src/modules/octopi/filesystem/home/root/bin/streamer_select

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Exit on any error.
+set -e
+
+CONFIG_FILE=/boot/octopi.txt
+MJPEG_TYPE=mjpeg
+HLS_TYPE=hls
+MJPEG_SERVICE=webcamd.service
+HLS_SERVICE=ffmpeg_hls.service
+DEFAULT_TYPE=${MJPEG_TYPE}
+FLAG_DIRECTORY=/etc/octopi_streamer
+
+source ${CONFIG_FILE}
+
+if [ -z ${camera_streamer+x} ]; then
+    echo "No streamer type is set. Defaulting to '${DEFAULT_TYPE}'."
+    camera_streamer=${DEFAULT_TYPE}
+fi
+
+rm -rf ${FLAG_DIRECTORY}
+mkdir -p ${FLAG_DIRECTORY}
+
+echo "Setting streamer type '${camera_streamer}'."
+if [ "${camera_streamer}" = "${MJPEG_TYPE}" ]; then
+    touch ${FLAG_DIRECTORY}/${MJPEG_TYPE}
+elif [ "${camera_streamer}" = "${HLS_TYPE}" ]; then
+    touch ${FLAG_DIRECTORY}/${HLS_TYPE}
+else
+    echo "Streamer type '${camera_streamer}' is not supported."
+    exit 1
+fi

src/modules/octopi/filesystem/root/etc/nginx/sites-available/default

@@ -0,0 +1,11 @@
+server {
+	listen 8051 default_server;
+
+	root /tmp/webcam;
+
+	location / {
+		# First attempt to serve request as file, then
+		# as directory, then fall back to displaying a 404.
+		try_files $uri $uri/ =404;
+	}
+}

src/modules/octopi/filesystem/root/etc/systemd/system/ffmpeg_hls.service

@@ -0,0 +1,33 @@
+[Unit]
+Description=FFMPEG HLS webcam streaming service
+ConditionPathExists=/etc/octopi_streamer/hls
+
+[Service]
+User=webcam
+Restart=always
+RestartSec=5
+Nice=10
+ExecStartPre=/bin/rm -rf /tmp/webcam
+ExecStartPre=/bin/mkdir -p /tmp/webcam/hls
+ExecStartPre=/bin/mkdir -p /tmp/webcam/jpeg
+
+ExecStart=/usr/bin/ffmpeg \
+    \
+    -framerate 30 -video_size 800x600 \
+    -i /dev/video0 \
+    \
+    -c:v mjpeg -q:v 0 \
+    -f image2 -update 1 \
+    /tmp/webcam/jpeg/frame.jpg \
+    \
+    -c:v h264_omx -profile:v high \
+    -b:v 2048k -flags +cgop \
+    -g 30 -keyint_min 30 \
+    \
+    -f hls -hls_time 1 -hls_flags delete_segments \
+    -hls_allow_cache 1 -hls_segment_type fmp4 \
+    -hls_list_size 32 -hls_delete_threshold 64 \
+    /tmp/webcam/hls/stream.m3u8
+
+[Install]
+WantedBy=multi-user.target

src/modules/octopi/filesystem/root/etc/systemd/system/streamer_select.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=OctoPi streamer selector
+Before=webcamd.service ffmpeg_hls.service nginx.service
+
+[Service]
+Type=oneshot
+ExecStart=/root/bin/streamer_select
+
+[Install]
+WantedBy=multi-user.target

src/modules/octopi/filesystem/root/etc/systemd/system/webcamd.service

@@ -1,5 +1,6 @@
 [Unit]
 Description=the OctoPi webcam daemon with the user specified config
+ConditionPathExists=/etc/octopi_streamer/mjpeg
 
 [Service]
 WorkingDirectory=/root/bin

src/modules/octopi/filesystem/root/lib/systemd/system/nginx.service

@@ -0,0 +1,20 @@
+# NGINX service definition based on Debian buster version.
+[Unit]
+Description=NGINX server for serving HLS and JPEG frames
+Documentation=man:nginx(8)
+After=network.target nss-lookup.target
+ConditionPathExists=/etc/octopi_streamer/hls
+
+[Service]
+Type=forking
+PIDFile=/run/nginx.pid
+ExecStartPre=/usr/sbin/nginx -t -q -g 'daemon on; master_process on;'
+ExecStart=/usr/sbin/nginx -g 'daemon on; master_process on;'
+ExecReload=/usr/sbin/nginx -g 'daemon on; master_process on;' -s reload
+ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid
+TimeoutStopSec=5
+KillMode=mixed
+Nice=10
+
+[Install]
+WantedBy=multi-user.target

src/modules/octopi/start_chroot_script

@@ -11,6 +11,8 @@ export LC_ALL=C
 
 source /common.sh
 
+WEBCAM_USER=webcam
+
 ### Script ####
 
 unpack /filesystem/home/pi /home/pi pi
@@ -29,7 +31,6 @@ apt-get -y --force-yes install python2.7 python-virtualenv python-dev git screen
 echo " - Reinstall iputils-ping"
 apt-get install --reinstall iputils-ping
 
-
 pushd /home/pi
 
   # build virtualenv
@@ -99,6 +100,14 @@ EOT
       popd
     popd
   fi
+
+  # FFMPEG HLS
+  if [ "$OCTOPI_INCLUDE_FFMPEG_HLS" == "yes" ]
+  then
+    apt-get install -y --force-yes --no-install-recommends ffmpeg nginx
+    useradd ${WEBCAM_USER}
+    usermod -aG video ${WEBCAM_USER}
+  fi
 
   #CuraEngine
   if [ "$OCTOPI_INCLUDE_CURAENGINE" == "yes" ]
@@ -234,19 +243,26 @@ then
   sudo -u pi sed -i -e "s@cura_engine: /usr/local/bin/cura_engine@cura_engine:@g" /home/pi/.octoprint/config.yaml
 fi
 
+### Streamer select service.
+
+systemctl_if_exists enable streamer_select.service
+
 ### mjpg_streamer
 
 if [ "$OCTOPI_INCLUDE_MJPGSTREAMER" == "yes" ]
 then
   systemctl_if_exists enable webcamd.service
 else
   rm /etc/logrotate.d/webcamd
-  rm /etc/init.d/webcamd
+  rm /etc/systemd/system/webcamd.service
   rm /etc/default/webcamd
   rm /root/bin/webcamd
 fi
 
+### HLS streamer
+
+systemctl_if_exists enable ffmpeg_hls.service
+
 #cleanup
 apt-get clean
 apt-get autoremove -y
-