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• Real Time Audio and Video Streaming in C#

  16 novembre 2014, par Nuwan

  I am developing an application which can be used to stream audio and video in real time.
  I can stream in two different ways. I used a capture card to capture live HD stream and
  re send it. And also I need to stream local video file in real time.

  Now I capture video using OpenCV and store frames as bitmaps in blokingCollection bitmap queue.
  After that I encode video frames using ffmpeg (used c# library Nreco) and stored in a queue. Then I send that encoded data through UDP (did not used RTP/RTSP) to omxplayer in raspberry pi and it works very fine.

  Then I captured audio data using ffmpeg
  I used this command to capture and encode audio data.

                   data = ms.ToArray();
  
                   ffMpegTask = ffmpegConverter.ConvertLiveMedia(
  
                          fileName,
  
                          null,
  
                          ms,
  
                          Format.avi,
  
                          new ConvertSettings()
  
                          {                                
  
                              CustomOutputArgs = " -tune zerolatency -ss " + second + " -t " + endTime + " -strict experimental -acodec aac -ab 160k -ac 2 -ar 44100 -vn ",                             
  
                          });
  
                  ffMpegTask.Start();
  
                  ffMpegTask.Stop();
  
                  byte[] data = ms.ToArray();

  After that I saved every audio data packet to queue.

  And I tried to stream these separate audio and video data to omxplayer by using two different
  ports. and received streams by using two omxplayers. And it works fine.

  But what I need to do is multiplex this audio and video stream and send as one stream.
  what I do is first stream two streams as UDP://224.1.1.1:1250(video) and UDP://224.1.1.1:1260(audio)
  then I used nreco invoke method. We can use it to execute ffmpeg commands.

  " -re -i udp://224.1.1.1:1250 -i udp://224.1.1.1:1260 -c copy -f avi udp://224.1.1.1:1270"

  and this works for both audio and video stream but completely out of sync.

  Next thing what I do is creating another ffmpeg ConvertLiveMedia task and write audio and video data
  to that task using write method. And I stream that mux data and received using ffplay. And it plays the stream
  and the sync problem is solved. But sometimes audio and video frames are dropping and then it begins to
  play out of sync.

                  combine = new MemoryStream();
  
                  ffMpegTaskcom = ffmpegConvertercom.ConvertLiveMedia(
  
                          Format.mpeg,
  
                          combine,
  
                          Format.avi,
  
                          new ConvertSettings()
  
                          {
  
                              CustomInputArgs = " ", // windows bitmap pixel format
  
                              CustomOutputArgs = " -threads 7 -c:v libx264 -preset ultrafast -tune zerolatency -strict experimental -profile:v baseline -movflags +faststart -tune film -level 3.0 -tune zerolatency -tune film -pix_fmt yuv420p -g 250 -crf 22 -b:v 4000k -minrate 3000k -maxrate 5000k -acodec aac -ab 160k -ac 2 -ar 44100",
  
  
  
                          });
  
                  ffMpegTaskcom.Start();
  
                  byte[] streamBytesvi = null;
  
                  byte[] streamBytesau = null;
  
                  encodeQueqe.TryDequeue(out streamBytesvi);
  
                  encodeQueqeau.TryDequeue(out streamBytesau);
  
                  ffMpegTaskcom.Write(streamBytesvi, 0, streamBytesvi.Length);
  
                  ffMpegTaskcom.Write(streamBytesau, 0, streamBytesau.Length);
  
  
  
                  //ffMpegTaskcom.Wait();
  
                  ffMpegTaskcom.Stop();

  Now I need to know a good method to deliver audio and video data with synchronization.
  Please tell me what is the wrong I have done or suggest a better way to do this.

  Thank You !

• how to build the binaries in ffmpeg-kit

  12 avril 2024, par Harpreet Singh.8052

  hey I want to use the ffmpeg in my android app and I used the ffmpeg-kit

  


  In the README of the ffmpeg-kit for android they write the steps to create binary but I'm facing difficulty understanding thest steps

  


  


  1. First is -> to setup android SDK or NDK i have checked these in my Android studio and I also added these in my environment variables

     


  


  2. Second -> is to install different packages autoconf automake libtool pkg-config curl git doxygen nasm cmake gcc gperf texinfo yasm bison autogen wget autopoint meson ninja ragel groff gtk-doc-tools libtasn1 im using windows so i installed window's one other is for the linux

     


  


  3. third -> is to run a android.sh command in the root directory of the project this will generate the binary for different architectures

     


  


  


  This is what is understant after reading the doc

  


  i dont understand the android.sh command from where can i get these script file , do i need to add .aar from here

  


  or do I need to copy the whole repository, i tried adding .arr file to my libs folder and trying to implement it inside my dependency but it showed error that duplicates classes

  


  If anyone used this library please tell me how can i implement and build binary

  


• How to get your Matomo plugin ready for GDPR

  24 avril 2018, par Matomo Core Team

  Are you developing a plugin for your self-hosted Matomo ? Have you maybe published a plugin on the Matomo Marketplace ? Then we highly recommend you read this article.

  On 25th May 2018, new privacy regulations become effective called GDPR (General Data Protection Regulation) which applies to businesses worldwide. It is also known under different wordings in other countries, for example to RGPD in French and Datenschutz-Grundverordnung, DS-GVO in German.

  If your plugin is storing any personal information or tracks or imports any data, we highly recommend you give the GDPR guide a read. You may also want to read our blog as we are releasing new content about GDPR regularly.

  In Matomo 3.5.0, we will introduce new features for GDPR and we implemented it in a way that most – but not all – plugins will support these features out of the box without having to do anything.

  Nevertheless, we recommend every plugin developer to check out our developer guide on how to make your plugin GDPR compliant to see what you need to do. A beta version of Matomo 3.5.0 is already available so you can test these new features. You can find them by logging in to your Matomo and going to “Administration => Privacy”.

  Please note that any version of Piwik will not be GDPR compliant, so it is recommended that your plugin supports the latest version of Matomo (3.5.0+).

  The post How to get your Matomo plugin ready for GDPR appeared first on Analytics Platform - Matomo.