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• FFMPEG version updating issue

  30 septembre 2017, par Sumit Marwha

  I am using ffmpeg library in one of my android project. I am using this library.

  https://github.com/WritingMinds/ffmpeg-android-java

  But it is using very old ffmpeg version. So I want to update ffmpeg version. I have used this library to compile ffmpeg version 3.3.3

  https://github.com/WritingMinds/ffmpeg-android

  now if i am running this command in terminal ffmpeg -version. I am getting the correct output as
  ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers

  Now i want to update ffmpeg version in
  https://github.com/WritingMinds/ffmpeg-android-java
  this library so i changed assets file to my compile ffmpeg file. But if i run the app and check version i am getting this output
  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developersbuilt with gcc 4.9.x

  I dont know why ffmpeg version is not changing. I have run command ndk-build as well after entering in jni folder but still ffmpeg version is not changing.
  Please suggest me any solution. Thanks in advance

• DirectShow IVideoWindow can't be wider than 4096px

  25 mars 2019, par ulvesked

  I have a C# application which uses DirectShow to show play video clips. We recently tried to play a video that is 9600x1080 px and it would not show. DirectShow emits events that everything.

  We use K-Lite codec pack (1295) and utilise ffdshow libx264 as codec and video renderer. Media Player Classic using the same renderer can play the clip just fine. The latest version of our application use DirectShow.NET while the older versions call DirectShow interfaces directly. Both old and new versions of our application have the same issues.

  After some experimentation we have found out the following :

  • If the video window width is 4096px or narrower it will render video. If it is 4097 or wider it will not render any video. We tried playing a HD-clip and a 720-clip with the same results. They will play when the video window is 4096x1080 but not when the window is 4097x1080 or wider.

  • When changing resolution or graphic settings there are some flashes (a few frames) of the video when the settings is applied, so that would suggest that it is in fact playing the video but it displays only black.

  Tested on Windows 10, 64 bit.

  Any ideas of what the we can do to fix this ?

• 3 seconds latency while streaming with Wowza Server

  18 mai 2015, par kaizen_labs

  I’m trying to develop a live streaming application with RTSP protocol.

  On the PC with the Wowza Server, I execute the following command :

  Code :

  ffmpeg -f dshow -i video="Name_Of_My_Cam":audio="Name_Of_My_Microphone" -vcodec
  
  h263p -f rtsp -muxdelay 0.1 rtsp://:1935/live/test

  And I’m trying to play this stream on a VideoView on my Samsung Galaxy Note 3 Lite. Here is the code :

  @Override
  
  protected void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_main);
  
  
  
      VideoView vv = (VideoView) findViewById(R.id.videoView);
  
      // Receive RTSP video from Wowza Server
  
      vv.setVideoURI(Uri.parse("rtsp://:1935/live/test"));
  
      vv.requestFocus();
  
      vv.start();
  
  }

  I managed to read the video and the sound but it makes 3 secondes (or more...) to start and I keep this delay during all the streaming. It is very annoying because I want to develop a call session.

  Does anybody know how to reduce this delay ? Is it a Wowza issue ?