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• ffmpeg native player started from spring application freezes

  21 mars 2018, par Jemo Mgebrishvili

  I have a spring-mvc project, from browser on button click I’m starting ffmpeg player (ffplay) for video/audio streaming, the problem is that, when player window is opened after the button click, it freezes and not responds, it shows one frame and stops frame updates but has audio voice, also I can’t move it and change player position, if I start the ffplay from cmd (outside from my app) it works fine.
  this is how I am starting the player

  Thread({
  
          val cmd = arrayOf("pathToTheffplay", "-loglevel", "verbose", "rtmp://localhost:portNum/streamName")
  
          val pb = ProcessBuilder(*cmd)
  
          pb.start()
  
          println("player started")
  
    }).start()

  what I am missing ? Any advice ?

• Convert Videos with FFMPEG to PowerPoint 2016 compatible video format [closed]

  11 septembre 2020, par Sebastian S.

  I am trying to convert a bunch of videos to a video format that is natively supported by PowerPoint 2013/2016 on a Windows 7 system.

  


  Microsoft recommends on their website mp4 with h264 and aac.

  


  Video and audio file formats supported in PowerPoint

  


  


  In PowerPoint 2013 and later, and in PowerPoint 2016 for Mac, for the best video playback experience, we recommend that you use .mp4 files encoded with H.264 video (a.k.a. MPEG-4 AVC) and AAC audio. In PowerPoint 2010, we recommend that you use .wmv files.

  


  


  


  We recommend using .m4a files encoded with AAC audio. In PowerPoint 2010, we recommend that you use .wav or .wma files.

  


  


  Audio is not important for me.
I tried to convert my videos with ffmpeg using the following options :

  


  ffmpeg -i Input.avi -c:v libx264 -preset slow -crf 22 -c:a copy Output.mp4


  


  However I cannot import the video to PowerPoint 2016 (32 or 64bit, I tried both). I always get a missing codec error.

  


  PPT Error when including video files

  


  Has anyone successfully encoded videos to a natively supported PowerPoint video format (on Windows) ?

  


• powerpoint 2016 screen recording

  13 mai 2016, par DeanB_Develop

  Compressing an .MP4 causes a transcoding process failure in FFMPEG. The MP4 was created using the PowerPoint 2016 Screen Recording tool.

  

  I created an .MP4 using the default configuration in PowerPoint 2016. When the file is compressed using FFMPEG, the process fails without creating a new file.

  Other .MP4’s work fine with FFMPEG. I believe the problem is with the .mp4 generated by PowerPoint 2016.