Fix balena cam

balena-cam/Dockerfile.aarch64

@@ -1,4 +1,4 @@
-FROM balenalib/raspberrypi3-debian:stretch-20190612
+FROM balenalib/raspberrypi3-debian:buster
 
 # Install dependencies
 RUN apt-get update && \
@@ -16,8 +16,8 @@ RUN apt-get update && \
     libatlas3-base \
     libatlas-base-dev \
     libjasper-dev \
-    libilmbase12 \
-    libopenexr22 \
+    libilmbase23 \
+    libopenexr23 \
     libavformat-dev \
     libswscale-dev \
     libqtgui4 \
@@ -29,9 +29,11 @@ RUN apt-get update && \
 
 # Enable the v4l2 driver for the Raspberry Pi camera
 #RUN printf "bcm2835-v4l2\n" >> /etc/modules
-RUN pip3 install --upgrade pip 
-RUN pip3 install async-timeout av==6.1.0
-RUN pip3 install pyee==8.2.2 aiohttp aiohttp_basicauth==0.1.3 aioice==0.6.10 aiortc==0.9.11 numpy==1.15.4 opencv-python==3.4.4.19 --index-url https://www.piwheels.org/simple
+
+RUN python3 -m pip install --upgrade pip setuptools wheel
+RUN python3 -m pip install async-timeout av --index-url https://www.piwheels.org/simple
+RUN python3 -m pip install -U aiohttp[speedups] aiohttp_basicauth aioice aiortc numpy opencv-python-headless --index-url https://www.piwheels.org/simple
+
 
 WORKDIR /usr/src/app
 

balena-cam/Dockerfile.template

@@ -1,4 +1,4 @@
-FROM balenalib/%%BALENA_MACHINE_NAME%%-debian:stretch-20190612
+FROM balenalib/%%BALENA_MACHINE_NAME%%-debian:buster
 
 # Install dependencies
 RUN apt-get update && \
@@ -16,8 +16,8 @@ RUN apt-get update && \
     libatlas3-base \
     libatlas-base-dev \
     libjasper-dev \
-    libilmbase12 \
-    libopenexr22 \
+    libilmbase23 \
+    libopenexr23 \
     libavformat-dev \
     libswscale-dev \
     libqtgui4 \
@@ -29,9 +29,10 @@ RUN apt-get update && \
 
 # Enable the v4l2 driver for the Raspberry Pi camera
 #RUN printf "bcm2835-v4l2\n" >> /etc/modules
-RUN pip3 install --upgrade pip 
-RUN pip3 install async-timeout av==6.1.0
-RUN pip3 install pyee==8.2.2 aiohttp aiohttp_basicauth==0.1.3 aioice==0.6.10 aiortc==0.9.11 numpy==1.15.4 opencv-python==3.4.4.19 --index-url https://www.piwheels.org/simple
+
+RUN python3 -m pip install --upgrade pip setuptools wheel
+RUN python3 -m pip install async-timeout av --index-url https://www.piwheels.org/simple
+RUN python3 -m pip install -U aiohttp[speedups] aiohttp_basicauth aioice aiortc numpy opencv-python-headless --index-url https://www.piwheels.org/simple
 
 WORKDIR /usr/src/app
 

balena-cam/app/server.py

@@ -1,4 +1,4 @@
-import asyncio, json, os, cv2, platform, sys
+import asyncio, json, os, cv2, platform, subprocess, sys
 from time import sleep
 from aiohttp import web
 from av import VideoFrame
@@ -165,10 +165,17 @@ async def on_shutdown(app):
     await asyncio.gather(*coros)
 
 def checkDeviceReadiness():
+    # TODO : check user is in video group !
+    # TODO : check if we are on a RPI
     if not os.path.exists('/dev/video0') and platform.system() == 'Linux':
         print('Video device is not ready')
         print('Trying to load bcm2835-v4l2 driver...')
-        os.system('bash -c "modprobe bcm2835-v4l2"')
+        try:
+            subprocess.run(['modprobe', 'bcm2835-v4l2'], check=True)
+        except FileNotFoundError:
+            print("Cannot modeprobe bcm2835-v4l2, not a Raspberry-Pi ?")
+        except subprocess.CalledProcessError as err:
+            print(err)
         sleep(1)
         sys.exit()
     else:
@@ -202,7 +209,7 @@ def checkDeviceReadiness():
         print('Set the username and password environment variables \nto enable authorization.')
         print('For more info visit: \nhttps://github.com/balena-io-playground/balena-cam')
         print('#############################################################\n')
-    
+
     # Factory to create peerConnections depending on the iceServers set by user
     pc_factory = PeerConnectionFactory()