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• Extract motion vectors from x265 (HVEC) encoded video with ffmepg/libavcodec ?

  16 novembre 2017, par John Allard

  I know that one can extract the motion vectors from an h264 encoded via by first setting the flag

  av_dict_set(&opts, "flags2", "+export_mvs", 0);

  then you can query the side-data for the motion vectors by doing this

  sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);

  When I looked online to see if you can do something similar with HVEC encoded videos, I wasn’t able to find any information. All I found was this by the definition of "AV_FRAME_DATA_MOTION_VECTORS"

  Motion vectors exported by some codecs (on demand through the
  export_mvs flag set in the libavcodec AVCodecContext flags2 option).

  The data is the AVMotionVector struct defined in
  libavutil/motion_vector.h.

  but there was no information on exactly which codecs export this motion vector information. How would I go about finding this out ?

• How to track WooCommerce orders in Matomo

  3 janvier 2018, par InnoCraft

  According to several sources (datanyze.com, builtwith.com, …) 20% of all online stores are using the WooCommerce WordPress solution. As a result, we thought some of you would be interested in knowing how you can track WooCommerce orders in Matomo (Piwik) without getting a headache.

  What is WooCommerce ?

  Some of you may not be familiar with WooCommerce. It is one of the most popular WordPress plugins allowing you to transform your website into an online store with a few clicks.
  The main advantages of WooCommerce are :

  • free of charge
  • highly customizable
  • easy to install
  • huge community

  Learn more about WooCommerce.

  The WooCommerce Analytics plugin for Matomo

  Tracking e-commerce websites is always challenging as there are so many things to be taken into consideration. However, the InnoCraft team (the professional branch of Matomo) has developed a premium feature in order to track all orders into Matomo (Piwik).

  The Matomo (Piwik) WooCommerce premium feature is straightforward and easy to install and configure. You can find the plugin settings in WooCommerce under “WooCommerce => Settings => Matomo” :

  

  Once done, you will see the data appearing in your Matomo (Piwik) when an order is completed :

  

  The InnoCraft team made sure the plugin will record all completed orders 100% correctly (eg. ignoring failed orders, not missing any completed orders). The plugin will even track orders of customers who use an ad blocker thanks to a server-side tracking technique.

  Learn more about the Matomo (Piwik) WooCommerce Analytics premium feature

  Is the WooCommerce Analytics plugin an alternative to my current Matomo tracking code ?

  No. The WooCommerce Analytics plugin only records orders and abandoned carts made through the WooCommerce plugin. It will not record any page views, events or other actions. If you are looking for a great WordPress plugin to insert the Matomo (Piwik) tracking code into your WP website, we strongly recommend WP-Piwik.

  Tell us your story

  If you are a WooCommerce or WordPress user and would like to tell us about how you use Matomo (Piwik), we would love to hear your story and blog about your WooCommerce or WordPress story !

  Write for Matomo

  The post How to track WooCommerce orders in Matomo appeared first on Analytics Platform - Matomo.

• Problems loading G.729 decoder with FFmpeg API

  20 juillet 2015, par gapc

  I built a class with the use of the FFmpeg API to decode several audio files (mp3, ogg, G.729, etc) and load them into a data structure as raw audio data. Now for example when I run the following code :

  codec = avcodec_find_decoder(AV_CODEC_ID_G729);
  
  if (codec == NULL){
  
      printf("Codec not found");
  
      exit(1);
  
  }

  The program will indeed output the error message, but if I load mp3 or ogg codecs there’s no issue.

  So to double check I executed in the terminal ffmpeg -decoders to see if the decoder is supported (which I also checked online) and outputs :

  A....D g729                 G.729

  I need the decoder for G.729. Is there anything I’m missing or doing something wrong ? Is there a different way to load this decoder ? Any suggestions would be greatly appreciated.

  The FFmpeg version installed is 2.7.1 on a Debian system

  API use example : https://www.ffmpeg.org/doxygen/2.7/decoding_encoding_8c-example.html