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• closing goroutine spawned by fiber endpoint

  30 mai 2023, par Nitin

  I have a program that is rtsp cameras to hls format using ffmpeg for streaming.
creating goroutines for each rtsp link as ffmpeg runs in background

  


  Streams are added by following code.

  


  func StreamProcess(data <-chan StreamData, ctx context.Context) {
for v := range data {
    ctx, _ := context.WithCancel(ctx)
    go func() {
        if !getStreams(v.camera_id) {
            var stream StreamState
            stream.camera_id = v.camera_id
            stream.state = true
            go Stream(v, ctx)
            wg.Wait()
        } else {
            return
        }
    }()
}   


  


  }

  


  Streaming function which runs ffmpeg command.

  


  func Stream(meta StreamData, ctx context.Context) error {
    log.Println("Started Streaming")
    ffmpegCmd := exec.Command("ffmpeg", "-i", meta.rtsp, "-pix_fmt", "yuv420p", "-c:v", "libx264", "-preset", "ultrafast", "-b:v", "600k", "-c:a", "aac", "-b:a", "160k", "-f", "rtsp", fmt.Sprintf("rtsp://localhost:8554/%s", meta.camera_id))
    output, _ := ffmpegCmd.CombinedOutput()

    log.Println(string(output))

    for {
        select {
        case <-ctx.Done():
           log.Println("killing process")
           ffmpegCmd.Process.Kill()
           return nil
        }
    }}


  


  my Goal is to stop each os.exec process (ffmpeg command) or at least close all goroutines that are under ffmpeg commands without closing fiber server.

  


  ** help required new to golang **

  


• which port ffmpeg is using for streaming to a rtmp(or rtmps) server running in a cloud location

  12 janvier 2023, par elsa

  I am working with ffmpeg and rtmp camera streaming in a constrained environment.
I have rtmp server running on a cloud (say eg. 11.23.123.13 in port 1935 for rtmp & 4936 for rtmps).
However is there any port on sending end , i should request team to open to avoid blocking the stream sending from device end to rtmp server end(camera streaming end). Only port 443 is open in device where camera connected and ffmpeg commands are running.

  


  It would be helpful if somebody give insights on how network is connecting from ffmpeg encoder to rtmp server

  


  

  1. Getting the details how network is connecting from ffmpeg encoder to rtmp server ?

  


  2. Which ports to be open in device end(where camera connecting) to start ffmpeg streaming to rtmp server running on cloud ?

  


  


• avcodec/mediacodecdec : don't break out if both input and output port return try again

  19 octobre 2022, par Zhao Zhili

  avcodec/mediacodecdec : don't break out if both input and output port return try again
  At the beginning of decoding, if we feed mediacodec too fast, the
  
  input port will return try again. It takes some time for mediacodec
  
  to consume bitstream and output frame. So the output port also return
  
  try again. It possible that mediacodec_receive_frame doesn't consume
  
  any AVPacket and no AVFrame is output. Then both avcodec_send_packet()
  
  and avcodec_receive_frame() return EAGAIN, which shouldn't happen.
  This bug can be produced with decoding benchmark on Pixel 3.
  Signed-off-by : Zhao Zhili <zhilizhao@tencent.com>
  

  • [DH] libavcodec/mediacodecdec.c