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• Is there any way to resume live h264 playback (client rejoin) using the h.264 codec ?

  22 février 2021, par Ice

  Currently, I'm having a bit of an issue with the MediaSource API for resuming live h264 playback.
My server-side code will keep the first packet from FFmpeg, then dispatch it to clients. However, this works well but raises an issue.

  


  When I restart the stream and it dispatches to the client(s), it goes as expected and this is the result I expect when a client disconnects then has to reconnect to the stream, is the aforementioned result

  


  However, if I were to rejoin the stream, I get this as the result

  


  Also, FFMpeg data is being sent to the client in the picture above, it's just not rendering it for some reason.

  


  Here's my function for playing audio/video frames that I get from the server.

  


  private _playFrame(type: 0 | 1) {
    const src = type === 0 ? this.audioSource : this.videoSource;
    if (!src || src.updating) return;
    const queue = type === 0 ? this.audioFrameQueue : this.videoFrameQueue;
    src.appendBuffer(queue.shift());
    if (this.video.src && this.video.paused) this.video.play().then(() => null);
}


  


• How to add silent data when no audio stream is flowing

  29 décembre 2020, par Edqe

  This is what I'm currently doing : How to insert silence pcm data when there is no data piping in

  


  Since fluent ffmpeg can use ffmpeg flags, is there a way to put silent data when no actual audio stream is received.

  


  Example :
  
/ represents real audio data
  
- represents silent
  
/////////////////-----///////----//////////
  
Receive audio    cut  data   cut data
  
From example above, put silent data on cut when no real data is received (I hope that explains a bit clearer)

  


  I found this discussion, does this work for the example above ? If so, how can I implement it ?

  


  Thanks in advance !

  


• ffmpeg rtsp_transport to rtmp issues

  16 mars 2015, par RandomCouch

  I’m working on a project that requires taking rtsp links from youtube, and using ffmpeg to stream those videos to an rtmp server. My solution works, however it is having some issues.

  I’m using these settings :

   -max_delay 0 -initial_pause 0 -rtsp_transport udp -i " + inputLink + " -vcodec libx264 -acodec mp3 -ab 48k -bit_rate 450 -r 25 -s 640x480 -f flv "  + stream

  inputLink is replaced with the rtsp link, and stream is replaced with the rtmp server link

  So this works but here are the issues I’m having :

  • At the beginning of each video, there is a big lag spike/lots of frames dropped, and then the video resyncs and plays normally

  • Some videos would crash ffmpeg, with a "Conversion failed" message and many frames dropped during the conversion/stream.

  • At the end of each video it would start lagging/ dropping frame, right near the end of the video, in other words it doesn’t end normally, every video ends by lagging out / dropping frames

  I’ve been struggling for a long time just to get this working, and now I finally did, I just need to perfect it by taking care of those two issues, if anyone has useful information about the rtsp_transport protocol and how to make it stream with no issues, I would greatly appreciate it. Thanks !