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• ffmpeg - switch rtmp streams into a single encoded output ?

  15 octobre 2015, par Stefan Kendall

  I have 1-5 input streams, each uploading on a slightly different time offset.

  With rtmp and ffmpeg, I can reliably encode a single stream into an HLS playlist that plays seamlessly on iOS, my target delivery platform.

  I know that you can accept multiple input streams into ffmpeg, and I want to switch between the input streams to create a consistent, single, seamless output.

  So I want to switch between
  rtmp://localhost/live/stream1 .. rtmp://localhost/live/stream5 on a regular interval. Sometimes there will be multiple streams, and sometimes there won’t.

  Is there any way for ffmpeg to rotate between input streams while generating an HLS playlist ? My goal is to avoid running duplicate instances of ffmpeg for server cost reasons, and I think connecting disparately encoded input streams for playback would be difficult if not impossible.

  Switching on each segment is the ideal behavior, but I also need to keep the streams in time sync. Is this possible ?

• How can i forcing current frame to be encoded as intra frame using libavcodec

  14 avril 2021, par pensir

  I want to change gop dynamic to adapt to player. Smaller gop help for reduce first screen cost ; Big gop help to reduce bitrate to save bandwidth.

  


  I found nvenc has a function which can solve the problem above.
https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/#forcing-current-frame-to-be-encoded-as-intra-frame

  


  But I'm using ffmpeg. Is there any similar function in ffmpeg ?

  


• How to publish your plugin or theme on the Piwik Marketplace – Introducing the Piwik Platform

  25 septembre 2014, par Thomas Steur — Community, Development

  This is the next post of our blog series where we introduce the capabilities of the Piwik platform. Over the last weeks we have already introduced you to some of the basics on how to create plugins and themes. This time you’ll learn how to publish a plugin or theme on the Piwik Marketplace to share it with all Piwik users.

  What is the Piwik Marketplace ?

  The Marketplace is a showcase for all plugins and themes that can be used in Piwik. You can browse them either on a standalone website or in Piwik itself by going to Settings => Marketplace. There you can install and update them with just one click. Easy as that ! While some of those plugins are provided by Piwik or Piwik PRO most of them are created and maintained by our community. Everyone is very welcome to distribute plugins or themes on the Marketplace.

  Prerequisites

  To publish your plugin on the Marketplace you simply need to meet these requirements :

  • The plugin name is not already taken by another plugin
  • The code of the plugin is hosted in a public GitHub repository
  • The GitHub service “Piwik plugins” for this repository is enabled (Repository Settings => Webhooks & Services => Add Service)
  • Push permission for this repository
  • The plugin is free (as in not paid)
  • The license must be compatible with the GNU General Public License v3 or any later version

  There is also list of Rules for plugins.

  Best practices

  Before actually distributing your plugin we recommend to follow a couple of best practices to make sure your plugin looks good on the Marketplace and provides useful information for your future users. If you have used the console to generate a plugin the needed files were already created for you.

  Provide a good description

  Make sure there is a file named README.md in the root of your plugin. When preparing your plugin for the Marketplace we will search for four sections in this file : Description, FAQ, Changelog and Support. Each of those is optional but it is good practice to provide at least a section Description and Support by prefixing them with ## . Any content of your readme outside of those sections will not be displayed on the Marketplace.

  # Piwik Plugin Name
  
  
  
  ## Description
  
  
  
  Add your plugin description here.
  
  
  
  ## Support
  
  
  
  Please direct any feedback to hello@piwik.org. 
  
  If you experience any issues feel free to file an issue at https://github.com/piwik/piwik/issues .

  A good example can be seen in the README.md of the CustomAlerts plugin and the related CustomAlerts plugin page.

  Provide screenshots

  This will improve your appearance in the Marketplace a lot and users will be more likely install your plugin. It is as easy as placing “png” or “jpg” files in a folder named screenshots. The filename of each image will be shown in the UI with underscores replaced by a whitespace. This way you can provide a nice description. Have a look at the CustomAlerts plugin to see how it works.

  Provide contact details

  Your contact details are specified in the plugin.json file of your plugin root folder. Providing at least one author and a link to your homepage is required. If you do not have a website you can use a link to your GitHub profile. This helps your users contact you in case they want to thank you for your great work or if they have any problem with it. An example plugin.json looks like this :

  {
  
      "name": "MyPluginName",
  
      "homepage": "http://piwik.org",
  
      "authors": [
  
          {
  
              "name": "Piwik",
  
              "email": "hello@piwik.org",
  
              "homepage": "http://piwik.org"
  
          }
  
      ],
  
      "support": {
  
        "email": "hello@piwik.org",
  
        "issues": "https://github.com/piwik/piwik/issues",
  
        "forum": "http://forum.piwik.org",
  
        "wiki": "https://github.com/piwik/piwik/wiki",
  
        "irc": "#piwik-dev"
  
      } 
  
  }

  Choose a license

  Choosing the right license that works best for you and your users is important. To distribute a plugin via the Piwik Marketplace the license must be compatible with the GNU General Public License v3 or any later version. If you do not specify a license anywhere in your plugin, it is assumed your plugin uses GPLv3 or later. The license must be specified in the plugin.json file using the property license :

  {
  
      "name": "MyPluginName",
  
      "license": "GPL v3+"
  
  }

  Provide donation links

  You can define a donation link or email for PayPal, Flattr and Bitcoin in the plugin.json file. Users that love your work will then be able to donate you money directly from the plugin page.

  {
  
      "name": "MyPluginName"
  
      "donate": {
  
          "paypal": "sponsor@piwik.org",
  
          "flattr": "https://flattr.com/profile/piwik",
  
          "bitcoin": "1234567890"
  
      }
  
  }

  How to publish the first version of your plugin

  We are trying to make it as easy as possible for you to publish your plugin on the Marketplace. That’s why we don’t require any logins or packaging. To publish your plugin you only have to create a new tag of your plugin and within a minute your plugin will be ready to be installed on hundreds of thousands of Piwik installations.

  To tag your plugin you can use one of the following two suggestions :

  Using the command line

  git tag 0.1.0 && git push --tags

  Where “0.1.0” is the name of the tag. While you can use any tag name it is best practice to use the current version number as defined in the plugin.json file.

  Using GitHub UI

  To tag a new version via GitHub click on Releases => Draft a new release.

  

  Now you can enter a tag name (version) and press “Publish release” as shown in this screen. That’s it !

  

  How to provide an update for your plugin

  To provide an update you only have to increase the version number in the file plugin.json and create another tag as explained in the previous section. Your new Plugin update will be visible on the Marketplace within a minute or so. It might take a bit longer until the update appears in Piwik itself as each Piwik server only checks for updates every few hours.

  For a complete list of information go to our Distributing Your Plugin guide in the Piwik Developer Zone.

  If you have any feedback regarding our APIs or our guides in the Developer Zone feel free to let us know.