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• Piwik IRC Meetup on Tuesday

  10 février 2014, par Fabian Becker — Community, Development

  With the release of Piwik 2.0 and the Piwik Marketplace we are focusing on the community aspect of Piwik Development. In order to give users and developers a chance to get involved in Piwik we decided to have IRC meetups every two weeks, where we discuss current and future plans of Piwik development.

  Why should I join ?

  This is the chance for everyone to directly talk to developers and discuss issues and feature ideas. It is also good if you want to get involved in development and pick up smaller features to get to know the code base.

  Next Piwik meetup

  • Date : Tuesday February 11th, 7.30pm UTC
  • Duration : 30min
  • IRC #piwik channel (irc.freenode.net)

  Topics are :

  • 2.1 release (closed tickets)
  • open tickets for Piwik 2.2

  To join the chat, you can use the website : http://webchat.freenode.net/ (or join with your IRC client of choice) – See also what will be the time in your country at 7.30pm UTC. You will find us in the Freenode channel #piwik.

• Calling ffmpeg kills script in background only

  14 mai 2014, par TimD

  I’ve got a python script that calls ffmpeg via subprocess to do some mp3 manipulations. It works fine in the foreground, but if I run it in the background, it gets as far as the ffmpeg command, which itself gets as far as dumping its config into stderr. At this point, everything stops and the parent task is reported as stopped, without raising an exception anywhere. I’ve tried a few other simple commands in the place of ffmpeg, they execute normally in foreground or background.

  This is the minimal example of the problem :

  import subprocess
  
  
  
  inf = "3HTOSD.mp3"
  
  outf = "out.mp3"
  
  
  
  args = [    "ffmpeg",
  
              "-y",
  
              "-i",   inf,
  
              "-ss",  "0",
  
              "-t",   "20",
  
              outf
  
          ]
  
  
  
  print "About to do"
  
  
  
  result = subprocess.call(args)
  
  
  
  print "Done"

  I really can’t work out why or how a wrapped process can cause the parent to terminate without at least raising an error, and how it only happens in so niche a circumstance. What is going on ?

  Also, I’m aware that ffmpeg isn’t the nicest of packages, but I’m interfacing with something that has using ffmpeg compiled into it, so using it again seems sensible.

• Date and segment comparison feature

  31 octobre 2019, par Matomo Core Team — Analytics Tips, Development

  Get a clearer picture with the date and segment comparison feature

  What can you do with it ? What are the benefits ?

  Make informed decisions faster by easily comparing different segments and dates with each other.

  Compare report data for multiple segments next to each other

  

  Directly compare the behaviour of visitors from different segments e.g. customers with accounts vs. customers without accounts. Segment comparisons are a powerful way to compare different audience ; learn which ones perform better ; and in what way their actions differ. 

  Compare report data for two time periods next to each other

  

  See how your website performs compared to the previous month/week/year. Including seeing trends over those periods. Say, your business always picks up at the same times within a year, or there’s a sag in business for every user segment over this year and the last except one.

  By being able to compare date ranges you are able to get a quick overview of trends and period to period performance. Has a campaign worked better in September than in October ? Get an instant look by having the side-by-side comparison in Matomo.

  What is it capable of ?

  It lets you ask the question, “What is different ?”

  If you look at reports you’ll only see how people behave overall and if you look at specific segments you’ll see how they behave at face value, however, if you compare data together you’ll be quickly informed on what makes them unique. This data is still there when you don’t use the comparison feature, it’s just buried. Comparing data highlights discrepancies and leads to important questions and answers.

  For example, perhaps some class of users have very low engagement on a specific day compared to the rest of your visitors, and perhaps those users are responsible for an outsized proportion of churn. 

  Who could benefit from it, and why ?

  Everyone can benefit from using it (and probably should use it). It’s yours to experiment with ! You shouldn’t feel restricted to only comparing between the current and last period, or having questions before you start comparing. Follow your instincts and see what pops out when data from different segments is laid out next to each other.

  Where can you find it in Matomo ?

  • Segment comparison is activated by the new icon in the segment selector

  

  • Date comparison can be found in the calendar section of Matomo

  

  • The list of active comparisons is visible at the top of the page for all pages that support comparison
  • Comparisons are visible in every report that supports comparing data, and reports that do not support it will display a message saying so

  How do you use it ?

  • To compare segments, click the icon in the segment selector
  • To compare periods, click the ‘compare’ checkbox in the period selector, then select what period you want to compare it against in the dropdown (previous period, previous year, or a custom range)
  • When comparisons are active, view your reports as normal

  Take it away !

  The comparison feature is a new tool from Matomo 3.12.0 that highlights discrepancies and differences in data that can lead to more clarity and understanding, so we’d encourage everyone to use it. 

  Try it out today in your Matomo and see the power behind this new data comparison mode !