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• Bad behavior live streaming from opencv to ffserver (ffmpeg)

  9 octobre 2015, par jlarghi

  I’m trying to do live streaming of the traffic videos.

  I have this fragment of C++ code :

  Mat frame, output;
  
  Size sizeOutput(640,360);
  
  cvtColor(frame, output, CV_RGB2GRAY);
  
  resize(output, output, sizeOutput);
  
  cout << output.data;

  In the other hand I run :

  ./opencvvehicletrack | ffmpeg -f rawvideo -pix_fmt gray -s 640x360 -i - -an  http://localhost:8090/feed1.ffm:

  Where opencvvehicletrack print on the stdout.

  And I got the next result : https://youtu.be/HqpAv_oi3u4

  I can’t fix the "continous displacement to the right"

  Can anyone help me ? Thanks a lot.

• FFMPEG & MistServer : RTMP Input/Output error

  17 octobre 2017, par brewcrazy

  I have an IP camera that outputs a RTSP stream that I’m trying to use to display a live feed on my website. This is a small site that only my wife and I will access so I’m trying to use a free streaming service. For that reason, I’ve decided to try MistServer’s open source option.

  I currently have downloaded MistServer and have it running without installation on my mac (sudo ./MistController). With MistServer running, I have a stream set up and default protocols configured. The stream is configured as follows :

  stream name: ipcam
  
  source: push://

  The configuration page gives me the following source to push to :

  RTMP full url: rtmp://127.0.0.1/live/ipcam
  
  RTMP url: rtmp://127.0.0.1/live/
  
  RTMP stream key: ipcam

  In the streams view, the stream’s status is unavailable, but I’m assuming this is because it isn’t receiving an input. I haven’t been able to confirm this via documentation.

  Here is the FFMPEG command that I am running and the error that I’m getting :

  ffmpeg -rtsp_transport tcp -i rtsp://<user>:@:554/live0.264 -acodec copy -vcodec copy -f flv rtmp://127.0.0.1/live/ipcam
  
  
  
  ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 8.1.0 (clang-802.0.42)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-vda
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Input #0, rtsp, from 'rtsp://<user>:@:554/live0.264':
  
    Metadata:
  
      title           : Session Streamed by LIBZRTSP
  
      comment         : live0.264
  
    Duration: N/A, start: 0.242000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 1280x720, 25 fps, 24.83 tbr, 90k tbn, 50 tbc
  
      Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
  
  rtmp://127.0.0.1/live/ipcam: Input/output error
  
  </user></user>

  I can’t determine from this error if the issue is the FFMPEG command or my MistServer configuration.

• lavu/opt-test : use automatic set and free handlers

  17 octobre 2013, par Stefano Sabatini

  lavu/opt-test : use automatic set and free handlers
  In particular, do not set default string value by hand and use
  
  av_opt_free() to free context.
  

  • [DH] libavutil/opt.c