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• Cannot stop and (re-play) a rtsp stream with FFMediaElement

  5 mars 2024, par CactusJack

  I have a problem using stop and play on a rtsp stream using the FFMediaElement.

  


  I am initializing an instance of the MediaElement once by doing m_MediaPlayer = new MediaPlayer();
This instance should live the whole application lifetime.

  


  After this, I open the rtsp stream : await m_MediaPlayer.Open(new Uri(rtspAdress));
The media opens, and when I do m_MediaPlayer.Play(); the stream is displayed in the MediaElement.

  


  Now I want to stop the stream with m_MediaPlayer.Stop(); and play it again. After calling play again, the stream is not diplayed anymore. The log says :

  


  Direct Command 'Close' accepted. Perparing execution.
OnStreamReadInterrupt was requested an immediate read exit.
EVENT START : BufferingEnded
EVENT DONE : BufferingEnded
V BLK : 14.388 | CLK : 14.417 | DFT : 29 | IX : 4 | RNG : 48.897% | PQ : 0.0k | TQ : 0.0k
Direct Command 'Close' entered
MediaState changed : + Close
Media closed.
OnStreamReadInterrupt was requested an immediate read exit.
EVENT START : MediaStateChanged
EVENT START : MediaClosed
EVENT DONE : MediaStateChanged
Direct Command 'Close' completed. Result : True
EVENT DONE : MediaClosed
Dispose Entered. Waiting for Command Manager processor to stop.
Dispose is waiting for pending direct commands.
Dispose is closing media.
EVENT START : MediaClosed
Media closed.
EVENT DONE : MediaClosed
Dispose completed.

  


  So why is Stop disposing the media ?
When I create a new player before re-playing and open the stream again, it works. But this takes a moment, so I just wat to stop and start again. Is that possible ?

  


• Play Multiple online videos in FFMPEG

  4 juillet 2014, par AndroidOptimist

  I’m trying to make an Android Applicaion that uses FFMPEG to play online streams. I gone through dolphin player source and with the help of this i achieved playing udp streams in android. Now i am trying to play multiple streams in my player. For example i have a list activity that has 10 names and by clicking each name the corrosponding video should be played. How can i achieve this in avformat_open_input. I am very new to ffmpeg. Please help me in achiving this. Thanks in advance.

  My c code is as follows :

  static int decode_module_init(void *arg) 
  
  {
  
      VideoState *is = (VideoState *)arg;
  
      AVFormatContext *pFormatCtx;
  
  
  
      int err;
  
      int ret = -1;
  
  
  
      int i;
  
  
  
      int video_index = -1;
  
      int audio_index = -1;
  
  
  
  
  
      is->videoStream=-1;
  
      is->audioStream=-1;
  
  
  
      char* Filename = "udp://.....";
  
  
  
      global_video_state = is;
  
  
  
      pFormatCtx = avformat_alloc_context();
  
      pFormatCtx->interrupt_callback.callback = decode_interrupt_cb;
  
      pFormatCtx->interrupt_callback.opaque = is;
  
  
  
  
  
      **err = avformat_open_input(&pFormatCtx, Filename , NULL, NULL);**
  
  
  
      if (err < 0) {
  
          __android_log_print(ANDROID_LOG_INFO, "message", "File open failed");
  
          ret = -1;
  
          goto decode_module_init_fail;
  
  
  
      }
  
  
  
      __android_log_print(ANDROID_LOG_INFO, "message", "File open successful");
  
  }

• Why can't Chrome 83 play this AV1 encoded video ?

  25 mai 2020, par Slbox

  The file plays great in VLC.

  



  I've tried adding the codecs="av01.0.05M.08" to the video source, but no luck - no browser will play it, despite what's stated here : https://caniuse.com/#feat=av1

  



  The video was encoded like so :

  



  ffmpeg -i input.avi -pix_fmt yuva420p -f nut -c:v libaom-av1 -minrate 1k -b:v 350k -maxrate 2000k -strict experimental output.mp4


  



  Browser console :

  



  


  • Chrome gives no hint whatsoever as to why it won't play. Firefox gives some minor clues.

  


  • Firefox shows the below

  


  



  Media resource https://example.com/example.mp4 could not be decoded. example.mp4


  



  Media resource https://example.com/example.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)
Details: static MP4Metadata::ResultAndByteBuffer __cdecl mozilla::MP4Metadata::Metadata(mozilla::ByteStream *): Cannot parse metadata


  



  Any advice on where I'm going wrong, either in understanding or in encoding arguments, would be greatly appreciated !