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• c# ffmpeg encode/decode audio and video

  31 juillet 2017, par IC.Fulvio

  I’m writing C# code to stream audio and video through RTSP. I use ffmpe.Autogen wrapper and NAudio. With the video I have no problem, hevc 25fps.

  About audio, I capture audio samples with NAudio and after, I copy the buffer in the AVframe data of ffmpeg. The audio codec that I use is : AAC f32le 44,1 khz. When I encode, in the main loop, I write one video frame and after one audio frame.

  while (video_st != null)
  
          {
  
  
  
              img1.CopyTo(imgframe);
  
              var startFrame = DateTime.Now;
  
  
  
              ret = Utility_ffmpeg.write_video_frame(outContext, video_st, frameCount, &dst_picture, frame, ref imgframe, sws_ctx);
  
  
  
              if (ret < 0)
  
              {
  
                  Debug.WriteLine("Write video frame failed.\n");
  
                  return;
  
              }
  
  
  
              var streamDuration = DateTime.Now - startSend;
  
  
  
              //audio
  
              if (enable_audio && srcAudio.audio_buff != null)
  
                  {
  
  
  
                  if (srcAudio.audio_buff_dim > 0)
  
                  {
  
                      lock (srcAudio.audio_buff)
  
                      {
  
                          frameCount++;
  
                          Utility_ffmpeg.write_audio_frame(outContext, srcAudio.audio_buff, srcAudio.audio_buff_dim, audio_st, frameCount);
  
                      }
  
                  }
  
              }
  
  
  
              Debug.WriteLine("Elapsed time " + streamDuration + ", video stream pts " + video_st->pts.val + ".\n");
  
  
  
              var frameDuration = DateTime.Now - startFrame;
  
              Debug.WriteLine(frameDuration+" total \n");
  
              //System.Threading.Thread.Sleep((int)((long)1000.0 / (long)STREAM_FRAME_RATE - (long)frameDuration.TotalSeconds));
  
              System.Threading.Thread.Sleep(40);
  
  
  
              //}
  
          }

  When I decode the video all is ok but the audio comes and goes. The synchronization is ok.
  I think the problem is that I need to send more audio frame then video, but I’m not sure. Someone has an idea about the origin of the problem ?
  Thanks in advance and sorry for my English.

• Create conversion queue using ffmpeg and C #

  22 octobre 2017, par Alexei Agüero Alba

  Ok, the idea is to create a file queue that can be modified and reorganized (this is done) and for each file execute a ffmpeg process to convert it to another format.

  For conversion use Xabe.FFmpeg and .Net 4.5 all using async and await.

  The question would be how to execute an x ​​number of processes in parallel (example 4) of that variable queue and when one of them finishes executing the next one, keeping in execution always the same amount in parallel. I can start from scratch but I need ideas on how to do this in the simplest way possible. The program itself is simple (with gui) takes a folder and its subfolders all the video files and queues them and starts the conversion, you can add other folders with more files, and independent files reorder them, to convert whichever is the greater.

  At one point I found a package I think nuget (or github) that did exactly what I needed but I have not been able to get back.

  Thanks for your help in advance.

  Excuse the English because I use the translator of Google for being faster because my domain of this is limited but sufficient to understand the answers.

  ---

  Ok, I found what I was looking for called ProcessManager is a nupkg package. It has 2 years of development but seems stable. The only drawback is that it does not allow me to organize the conversion queue once you have added the files, although I have to try some ideas that maybe functions.

  var manager = new Manager(4); // Max 4 processes will be started simultaneously
  
  manager.Start();
  
  
  
  manager.ProcessErrorDataReceived += (sender, e) => Console.WriteLine(e.Data);
  
  manager.ProcessOutputDataReceived += (sender, e) => Console.WriteLine(e.Data);
  
  
  
  foreach (var videoFileName in Directory.EnumerateFiles("videos"))
  
  {
  
      var info = new ProcessInfo(
  
          "ffprobe.exe",
  
          string.Format("-v quiet -print_format json -show_format -show_streams \"{0}\"", videoFileName));
  
  
  
      manager.Queue(info);
  
  }

  Process Manager

• Looking for a Sales Development Representative (Jobs at Piwik)

  20 mai 2015, par Piwik Core Team — Jobs

  This blog post is a job offer at Piwik PRO for a Sales Development Representative. Please share this job ad if you know anyone who may be interested.

  Job description

  As a sales development rep your job will be to work with our sales team to identify and nurture sales opportunities. You will be one of the initial building blocks of our US operation, especially as we begin to scale it, so there will be plenty of opportunities for advancement within the company.

  Responsibilities

  • Generate new sales opportunities
  • Help to develop and improve sales strategies
  • Set up discussions with senior executives and evaluate their business needs
  • Manage and nurture a pipeline of prospects until a given stage
  • Use marketing & sales CRM tools

  Requirements

  • Desire to learn and succeed in sales
  • 1+ years of related experience
  • Advanced research skills
  • Ability to write professional emails
  • Native English proficiency with excellent verbal communication skills
  • Passion for technology

  Compensation

  Salary (full-time) + performance-based incentives

  Location

  Remote

  About Piwik PRO

  At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by over 1.1M websites worldwide and is currently ranked the 7th most used web analytics tool in the world. Our vision is to build the best open alternative to Google Universal Analytics.

  The Piwik platform collects, stores and processes a lot of information : hundreds of millions of data points each month. We create intuitive, simple and beautiful reports that delight our users.

  Apply online

  To apply for this position, please Apply online here. We look forward to receiving your applications !