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--- solutions:video_stream_using_rpi_as_proxy [2021/07/26 12:00] – created atolstov
+++ solutions:video_stream_using_rpi_as_proxy [2021/08/04 10:13] – atolstov
@@ Line 1: / Line 1: @@
-  * **Dahua** DH-IPC-K22
+==== Intro ====
-  * **Hikvision** DS-2CD2423G0-IW
+Nowadays, IP camera's manufacturers do not provide unauthorized access to video stream due to security reasons. To use videostream in WebHMI it should be without login/password to access. Also, using a server in between PC and IP Camera will allow access from many users, what is a true broadcast, unlike direct IP camera connection, which is usually limited to 10 users.
+The solution, is the shim web server in LAN, which will transcode H.264 to MJPEG. (e.g. Raspberry Pi).
+Also, this could be a Linux or Windows powered machine.
+==== Devices prerequisites ====
+=== IP Webcam testing app ===
+If there is no IP camera at moment, you can use [[https://play.google.com/store/apps/details?id=com.pas.webcam|IP Webcam]] to test WebHMI videostream (as it is not ecrypted be default) or VLC transcoding if you want to substitute phone with IP camera later after testing.
+Any IP camera, that can show stream using rtsp:// or http:// protocol.
+You can see the links at IP Webcam app screen. When the IP Webcam server started, it has default cgi access via link <code> http://phone-ip:8080/video</code>
+=== IP camera CGI setting ===
+By default, cgi should be enabled manually in settings.\\
+''Hikvision: Configuration, Network, Advanced Settings, Enable Hikvision-CGI. Then create a cgi user.''\\
+''Dahua: Configuration, Integration Protocol, Enable CGI. Use web login user.''\\
+=== Tested devices list: ===
+For example, there was a two different manufacturers devices tested.
+**Dahua** DH-IPC-K22          <code bash cgi-link>http://login:password@ip-camera:80/cgi-bin/mjpg/video.cgi?channel=1&subtype=1</code>
+**Hikvision** DS-2CD2423G0-IW <code bash cgi-link>http://login:password@ip-camera:80/Streaming/channels/102/httpPreview</code>
 ==== VLC transcode ====
-<code bash>
+  * WebHMI with IP 192.168.1.1
+  * IP Camera with IP 192.168.1.2
+  * Broadcast server with IP 192.168.1.3
-#full
+Broadcast server can be Windows or Linux machine, e.g. Rapsbian on Raspberry Pi .
-vlc -Idummy rtsp://student:Hikvision@192.168.1.58:554/Streaming/Channels/102  --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=192.168.1.192:8888/}"
+Let's consider using Rapsberry Pi 3B+ powered Raspbian 10.
-vlc -Idummy http://student:Hikvision@192.168.1.58:80/Streaming/channels/102/httpPreview --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=192.168.1.192:8888/}"
-#width crop
+To do this, VLC player is preinstalled with Rapsbian.
-vlc -Idummy rtsp://student:Hikvision@192.168.1.58:554/Streaming/Channels/102  --sout "#transcode{vcodec=MJPG,vfilter=canvas{width=640,height=480}}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=192.168.1.192:8888/}"
+If it is not present in the system, you can install it with
-vlc -Idummy http://student:Hikvision@192.168.1.58:80/Streaming/channels/102/httpPreview --sout "#transcode{vcodec=MJPG,vfilter=canvas{width=640,height=480}}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=192.168.1.192:8888/}"
+<code bash>sudo apt-get install vlc</code>
+To start with, login to IP-camera and check the settings, if cgi enabled and test access via link using browser.
+Alternatively, if you want to test to possibility, use IP Webcam app. There is default config which allows both vlc or WebHMI videostream testing.
+===Command to output and argument explanations===
+Access to IP cameras stream usually can be provided via RTSP or HTTP protocols.
+Put the link in the following example and try to watch and then to transcode stream.
+<code bash example_stream>
+cvlc -vvv http://login:password@ip-address:port/link_to_stream
 </code>
+That should look like this:
+<code bash test_stream>
+cvlc -vvv rtsp://student:Hikvision@192.168.1.58:554/Streaming/Channels/102
+</code>
+If you can see the image, so the IP camera settings done and now you can start configure transcoding.
+<code bash example_transcode_stream>
+cvlc -vvv -Idummy http://login:password@ip-address:port/link_to_stream  --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8888/}"
+</code>
+For example let's use login and password with IP camera' IP, using RTSP protocol (through 554 port) and transcode the full resolution stream to 192.168.1.3:8888 which is Raspberry Pi server and custom port 8888.
+<code bash test_transcode_stream>
+cvlc -vvv -Idummy rtsp://student:Hikvision@192.168.1.2:554/Streaming/Channels/102  --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=192.168.1.3:8888/}"
+</code>
+Let's take a closer look at the command. The source stream is:
+<code>rtsp://student:Hikvision@192.168.1.2:554</code>
+Destination can be also set port only, and the IP will be IP of Raspberry Pi to get access to stream
+<code>dst=:8888/</code>
+The output broadcast URL is
+<code>http://192.168.1.3:8888</code>
+To test if it works, copy following link to terminal and run with ''-vvv'' argument to show the maximum verbosity.
+The output should not have warning and unresolved errors such as no codecs finded.
+==== Perfomance optimisation ====
+<WRAP center round important 60%>
+Do not forget to get rid of ''-vvv'' argument due to huge additional processor load.
+</WRAP>
+There are some variants to try to optimize performance
+  * Decrease IP camera stream resolution
+  * Lower transcode output resolution
+=== Lower picture resolution ===
+<code bash>
+#full resolution
+cvlc -Idummy http://login:password@ip-address:80/link_to_stream --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8888/}"
+cvlc -Idummy rtsp://http://login:password@ip-address:554/link_to_stream --sout "#transcode{vcodec=MJPG}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8888/}"
+#transcode to lower resolution
+cvlc -Idummy http://login:password@ip-address:80/link_to_stream --sout "#transcode{vcodec=MJPG,vfilter=canvas{width=640,height=480}}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8888/}"
+cvlc -Idummy rtsp://http://login:password@ip-address:554/link_to_stream --sout "#transcode{vcodec=MJPG,vfilter=canvas{width=640,height=480}}:standard{access=http{mime=multipart/x-mixed-replace;boundary=--7b3cc56e5f51db803f790dad720ed50a},mux=mpjpeg,dst=:8888/}"
+</code>