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• How should I write my privacy notice for Matomo Analytics under GDPR ?

  24 avril 2018, par InnoCraft

  Important note : this blog post has been written by digital analysts, not lawyers. The purpose of this article is to show you an example of a privacy notice for Matomo under GDPR. This work comes from our interpretation of the UK privacy commission : ICO. It cannot be considered as professional legal advice. So as GDPR, this information is subject to change. We strongly advise you to have a look at the different privacy authorities in order to have up to date information.

  A basic rule of thumb is that if you are not processing personal data, then you do not need to show any privacy notice. But if you are doing so, such as processing full IP addresses, then a privacy notice is required at the time of the data collection. Please note that personal data may also be hidden, for example, in page titles or page URLs.

  In this blog post, we will define what a privacy notice is according to GDPR and how to write it if you are using Matomo and you are processing personal data.

  What is a privacy notice under GDPR ?

  One of the most important rights that a data subject has under GDPR, is the right to be informed about the collection and use of their personal data.

  Here is what ICO is saying about the privacy notice :

  “You must provide individuals with information including : your purposes for processing their personal data, your retention periods for that personal data, and who it will be shared with. We call this ‘privacy information’.”

  “When you collect personal data from the individual it relates to, you must provide them with privacy information at the time you obtain their data.”

  Note that a privacy notice is different from a privacy policy.

  The privacy notice has to include :

  • the reasons why you are processing the personal data
  • for how long
  • who the different parties you are going to share them with are

  So whatever lawful basis you are using (explicit consent or legitimate interest), you need to have a privacy notice if you collect personal data.

  What does this privacy notice look like ?

  ICO is providing best practices in order to display the information :

  • a layered approach
  • dashboards
  • just-in-time notices
  • icons
  • mobile and smart device functionalities

  Once more, it really depends on the data you are processing with Matomo. If you wish to track personal data on the entire website, you will probably have an upper or footer privacy notice such as :

  

  If you wish to process specific data, you could also insert just-in-time notices such as :

  

  What is the information you need to disclose to the final user ?

  To us, there are two things to distinguish between the privacy notice and the privacy policy.

  According to ICO, the privacy notice needs to include the 3 following elements :

  • the reasons why you are processing the personal data
  • for how long
  • who are the different parties you are going to share them with

  But you also need to inform them about :

  • The name and contact details of your organisation.
  • The name and contact details of your representative (if applicable).
  • The contact details of your data protection officer (if applicable).
  • The purposes of the processing.
  • The lawful basis for the processing.
  • The legitimate interests for the processing (if applicable).
  • The categories of personal data obtained (if the personal data is not obtained from the individual it relates to).
  • The recipients or categories of recipients of the personal data.
  • The details of transfers of the personal data to any third countries or international organisations (if applicable).
  • The retention periods for the personal data.
  • The rights available to individuals in respect of the processing.
  • The right to withdraw consent (if applicable).
  • The right to lodge a complaint with a supervisory authority.
  • The source of the personal data (if the personal data is not obtained from the individual it relates to).
  • The details of whether individuals are under a statutory or contractual obligation to provide the personal data (if applicable, and if the personal data is collected from the individual it relates to).
  • The details of the existence of automated decision-making, including profiling (if applicable).

  Pretty long, don’t you think ? In order to reduce it, you can either adopt a layered approach where your “pop-up” window will act as a drop down menu. Or from what we understood, page 5 of this document provided by ICO, a privacy notice can link to a more detailed document, such as a privacy policy page.

  Examples

  Let’s take the example of a website which tracks the non-anonymised full IP address, and using User ID functionality to keep track of logged-in users. Under GDPR, the owner of the website will have to choose either to process personal data based on “Legitimate interests” or on “Consent”. Here is how it will look like :

  Example of a privacy notice under GDPR Legitimate interests

  This site uses Matomo to analyze traffic and help us to improve your user experience.

  We process your email address and IP address and cookies are stored on your browser for 13 months. This data is only processed by us and our web hosting platform. Please read our Privacy Policy to learn more.

  Example of a privacy notice under GDPR Consent

  This site uses Matomo to analyze traffic and help us to improve your user experience.

  We process your email address and IP address and cookies are stored on your browser for 13 months. This data is only processed by us and our web hosting platform.

  [Accept] or [Opt-out]

  Please read our Privacy Policy to learn more.

  Once that information is provided to the user, you can then link it to your privacy policy where you will provide more details about it. Soon we will issue a blog post dealing with how to write a privacy policy page for Matomo.

  The post How should I write my privacy notice for Matomo Analytics under GDPR ? appeared first on Analytics Platform - Matomo.

• Best way to diagnose VideoCapture not opening the rtmp stream

  8 janvier 2021, par Greg0ry

  I am pulling my hair off for a few days and I'm out of ideas.

  


  I have two rtmp streams

  


  

  • first stream is transcoded directly by myself (I use ffmpeg to transcode) and then I attach to that stream with opencv - VideoCapture can open the stream with no problem

  


  • second stream is transcoded by 3rd party system (this system captures video through WebRTC and then encodes to h264) - this stream cannot be opened by VideCapture no matter what I do

  


  


  I can attach with pure ffmpeg to that dodgy stream and I can restream - but this is not ideal as introduces extra network traffic and latency.

  


  I was playing with OPENCV_FFMPEG_CAPTURE_OPTIONS environmental variable (I was trying to remove audio stream, change the video codec, playing with rtmp options like this OPENCV_FFMPEG_CAPTURE_OPTIONS="loglevel;debug" python my_script.py) - no joy

  


  So I figured I am trying to solve this problem from wrong end. I should somehow collect underlying ffmpeg logs that should be available when calling VideoCapture. So I tried to set OPENCV_FFMPEG_CAPTURE_OPTIONS="v;debug" but I can see no ffmpeg output when calling VideoCapture.

  


  This is very simple python3 script I was using during tests :

  


  import cv2 as cv
dodgy_cap = cv.VideoCapture()
dodgy_cap.open('rtmp://my_local_ip_address/rtmp/dodgy_stream_name')
print(dodgy_cap.isOpened())  # always returns False
healthy_cap = cv.VideoCapture()
healthy_cap.open('rtmp://my_local_ip_address/rtmp/healthy_stream_name')
print(healthy_cap.isOpened())  # always returns True


  


  I collected information about both streams with ffprobe, but even though they look different I cannot see what would be the difference that prevents opencv from opening VideoCapture for dodgy stream..

  


  This is a fragment from (very) verbose log for healthy stream :

  


  RTMP_ClientPacket, received: notify 254 bytes                                                                                                                                                                                               
(object begin)                                                                                                                                                                                                                              
Property:                                                                                                                                                                                  
Property:                                                                                                                                                                                             
(object begin)                                                                                                                                                                                                                              
Property:                                                                                                                                                                                        
Property:                                                                                                                                                                                     
Property:                                                                                                                                                                                     
Property:                                                                                                                                                                                        
Property:                                                                                                                                                                                        
Property:                                                                                                                                                                                        
Property:                                                                                                                                                               
Property:                                                                                                                                                                         
Property:                                                                                                                                                                               
Property:                                                                                                                                                                                        
(object end)                                                                                                                                                                                                                                
(object end)                                                                                                                                                                                                                                
Metadata:
  duration              0.00
  width                 2048.00
  height                1536.00
  videodatarate         0.00
  framerate             6.00
  videocodecid          7.00
  title                 Session streamed by "preview"
  comment               h264Preview_01_main
  encoder               Lavf58.20.100
  filesize              0.00

(... raw network packets ...)

Input #0, flv, from 'rtmp://my_local_ip_address/rtmp/healthy_stream_name':
  Metadata:
    title           : Session streamed by "preview"
    comment         : h264Preview_01_main
    encoder         : Lavf58.20.100
  Duration: 00:00:00.00, start: 159.743000, bitrate: N/A
    Stream #0:0, 41, 1/1000: Video: h264 (High), 1 reference frame, yuv420p(progressive), 2048x1536, 0/1, 6 fps, 6 tbr, 1k tbn



  


  And this is the fragment for dodgy stream :

  


  RTMP_ClientPacket, received: notify 205 bytes                                                                                                                                                                                               
(object begin)                                                                                                                                                                                                                              
Property:                                                                                                                                                                                                 
(object begin)                                                                                                                                                                                                                              
Property:                                                                                                                                                                                
Property:                                                                                                                                                                            
Property:                                                                                                                                                                                       
Property:                                                                                                                                                                                       
Property:                                                                                                                                                                                       
Property:                                                                                                                                                                                    
Property:                                                                                                                                                                                        
Property:                                                                                                                                                                                      
Property:                                                                                                                                                                                      
(object end)                                                                                                                                                                                                                                
(object end)                                                                                                                                                                                                                                
RTMP_ReadPacket: fd=3                                                                                                                                                                                                                       

(... raw network packets ...)

Input #0, flv, from 'rtmp://my_local_ip_address/rtmp/dodgy_stream_name':
  Duration: N/A, start: 4511.449000, bitrate: N/A
    Stream #0:0, 41, 1/1000: Video: h264 (High), 1 reference frame, yuv420p(progressive, left), 640x480, 0/1, 15.17 fps, 15.08 tbr, 1k tbn, 30 tbc
    Stream #0:1, 124, 1/1000: Audio: aac (LC), 48000 Hz, mono, fltp



  


  Both streams don't require any authentication (they are not exposed to the outside world)

  


  Dodgy stream contains audio but I don't think it is source of problem as I was able to connect to other healthy rtmp streams that contained audio..

  


  I have no more ideas how can I debug this problem, please help..

  


  ---

  


  I found in VideoCap documentation that I can enable exception mode, however it did not help much (it says where it failed but it does not say why) :

  


  >>> dodgy_stream = cv.VideoCapture()&#xA;>>> dodgy_stream.setExceptionMode(True)&#xA;>>> dodgy_stream.open("rtmp://my_local_ip_address/rtmp/dodgy_stream_name")&#xA;Traceback (most recent call last):&#xA;  File "<stdin>", line 1, in <module>&#xA;cv2.error: OpenCV(4.5.0) /tmp/pip-req-build-s_nildlw/opencv/modules/videoio/src/cap.cpp:177: error: (-2:Unspecified error) could not open &#x27;rtmp://my_local_ip_address/rtmp/dodgy_stream_name&#x27; in function &#x27;open&#x27;&#xA;</module></stdin>

  


• Evolution #3089 : Suppression des rubriques : informer des liens qui empêchent

  11 août 2014, par Fil Up

  un message de neofutur qui dit quelque chose de similaire :

  ```
  09:41 (02:58) < neofutur>
  http://forum.spip.net/fr_256464.html#forum258451
  09:41 (02:58) < neofutur> a priori des tas de gens ont ce probleme
  09:41 (03:00) < neofutur> empecher la suppression de la sous
  rubrique vide parce qu elle a une photo associee en tant que
  logo . . . ca meriterai une explication
  09:41 (05:04) < neofutur> peut etre avoir un bouton "supprimer" qyi
  est inactif ( greyed ) avec un survol qui dit "supprimer d
  abord le logo . . ."
  ```