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• How to stream MJPEG stream to RTMP server ?

  24 octobre 2018, par geooot

  I have a MJPEG stream and I’m trying to use ffmpeg to take it as an input and stream it to an rtmp server at a defined framerate.

  I have already tried this as a command :

  ffmpeg -f mjpeg -r 60 -i http://localhost:3030/ -f flv -vcodec flv rtmp://localhost/live/test

  While ffmpeg looks like it is sending something...

  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
    built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
    configuration : —prefix=/usr/local/Cellar/ffmpeg/4.0.2 —enable-shared —enable-pthreads —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-gpl —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —enable-videotoolbox —disable-lzma
    libavutil      56. 14.100 / 56. 14.100
    libavcodec     58. 18.100 / 58. 18.100
    libavformat    58. 12.100 / 58. 12.100
    libavdevice    58.  3.100 / 58.  3.100
    libavfilter     7. 16.100 /  7. 16.100
    libavresample   4.  0.  0 /  4.  0.  0
    libswscale      5.  1.100 /  5.  1.100
    libswresample   3.  1.100 /  3.  1.100
    libpostproc    55.  1.100 / 55.  1.100
  Input #0, mjpeg, from ’http://localhost:3030/’ :
    Duration : N/A, bitrate : N/A
      Stream #0:0 : Video : mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 60 tbr, 1200k tbn, 60 tbc
  [tcp @ 0x7f95f9401ec0] Connection to tcp ://localhost:1935 failed (Connection refused), trying next address
  Stream mapping :
    Stream #0:0 -> #0:0 (mjpeg (native) -> flv1 (flv))
  Press [q] to stop, [?] for help
  [swscaler @ 0x7f95fa033e00] deprecated pixel format used, make sure you did set range correctly
  Output #0, flv, to ’rtmp ://localhost/live/test’ :
    Metadata :
      encoder : Lavf58.12.100
      Stream #0:0 : Video : flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 60 fps, 1k tbn, 60 tbc
      Metadata :
        encoder : Lavc58.18.100 flv
      Side data :
        cpb : bitrate max/min/avg : 0/0/200000 buffer size : 0 vbv_delay : -1
  frame=   20 fps=3.2 q=31.0 size=     194kB time=00:00:00.31 bitrate=4999.6kbits/s speed=0.0512x
  

  I cannot preview the stream through VLC. Weirdly enough, if I let VLC try to load the url (rtmp ://localhost/live/test) and then close ffmpeg, VLC will actually show the video stream for a few frames and then stop again.

  Help on how to achieve this would be much appreciated.

• Switch between rtsp stream and static image input on the fly based on rtsp stream availability in ffmpeg command while recording

  3 décembre 2022, par Abdullah Farweez

  Basically there are two inputs for ffmpeg planning to execute Windows 10 OS. RTSP stream and static image. While saving frames if rtsp strram is not available or timeout occurs, then ffmpeg immediately switch to second input. If rtsp stream is back, continue with rtsp.

  


  Key expectations is that the process should not try to reconnect to rtsp source or process should not restart.

  


  Ffmpeg commands with/without pipes or gstreamer or simple proxy server or any fresh solutions with scrpts/commands/codes to try outs are highly appreciated.

  


• Record stream from camera to file / live stream

  8 juillet 2015, par sandman

  I’m trying to stream my camera feed to a webpage. For this I’m trying to use FFmpeg to encode the data from the camera preview and output to a file. (I’m new to this, so I’m only trying to write to a file now)

  The camera feed is captured and it starts writing to a flv file but, it freezes my app after a few seconds and the resulting flv is about half a second long.

  bos is a BufferedOutputStream which servers as an input stream for the Ffmpeg ProcessBuilder.

  When a button is clicked, the Ffmpeg process is executed and the writing begins.
  But as I said, it freezes the app after a while. I tried running the Ffmpeg process in an AsyncTask, but it keeps saying FileDescriptor closed, but the app does not freeze when I do it this way, and there is no output as well.

  Here is my onPreviewFrame() :

  public void onPreviewFrame(byte[] b, Camera c) {
  
      if (recording) {
  
          int previewFormat = p.getPreviewFormat();
  
          Log.v(LOGTAG, "Started Writing Frame");
  
  
  
          im = new YuvImage(b, previewFormat, p.getPreviewSize().width, p.getPreviewSize().height, null);
  
          Rect r = new Rect(0, 0, p.getPreviewSize().width, p.getPreviewSize().height);
  
          if (bos != null)
  
              im.compressToJpeg(r, 40, bos);
  
          im = null;
  
  
  
          Log.v(LOGTAG, "Finished Writing Frame");
  
      }
  
  }

  If I can get this fixed, I can probably move on to live streaming.