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• Want to send a video from desktop to Wowza using ffmpeg

  3 mars 2018, par ST94

  I am trying to stream a local .mp4 video file from my laptop to Wowza Streaming Engine using ffmpeg. Both systems are able to ping each other. I give the following command on my laptop

  ffmpeg -re -i bunny_1080p_60fps_normal.mp4 -vcodec libx264 -acodec aac -ar 48000 -strict experimental -f flv "rtmp://192.168.1.22:1935/live/myStream"

  192.168.1.22 is the IP address of Wowza server residing on another system running Ubuntu 17.04.

  I see the following on the command prompt of my laptop when I give the above command,

  ffmpeg version N-89894-g18e2ac032e Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
  
    libavutil      56.  7.100 / 56.  7.100
  
    libavcodec     58.  9.100 / 58.  9.100
  
    libavformat    58.  5.101 / 58.  5.101
  
    libavdevice    58.  0.101 / 58.  0.101
  
    libavfilter     7. 11.101 /  7. 11.101
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bunny_1080p_60fps_normal.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1
  
      creation_time   : 2013-12-16T17:59:32.000000Z
  
      title           : Big Buck Bunny, Sunflower version
  
      artist          : Blender Foundation 2008, Janus Bager Kristensen 2013
  
      comment         : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net
  
      genre           : Animation
  
      composer        : Sacha Goedegebure
  
    Duration: 00:10:34.53, start: 0.000000, bitrate: 4486 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 4001 kb/s, 60 fps, 60 tbr, 60k tbn, 120 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-12-16T17:59:32.000000Z
  
        handler_name    : GPAC ISO Video Handler
  
      Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, s16p, 160 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-12-16T17:59:37.000000Z
  
        handler_name    : GPAC ISO Audio Handler
  
      Stream #0:2(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 320 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-12-16T17:59:37.000000Z
  
        handler_name    : GPAC ISO Audio Handler
  
      Side data:
  
        audio service type: main
  
  [rtmp @ 000001ed7c4108c0] No credentials set
  
  [rtmp @ 000001ed7c4108c0] Server error: [ AccessManager.Reject ] : [ code=403 need auth; authmod=adobe ] :
  
  rtmp://192.168.1.22:1935/live/myStream: Unknown error occurred

  Can anyone please tell me what the exact procedure is to stream a video file to Wowza .

  How will I be able to view the stream at Wowza ?

• lavf/movenc : Write 'dby1' minor brand if Dolby content is being muxed to MP4

  3 août 2021, par Derek Buitenhuis

  lavf/movenc : Write 'dby1' minor brand if Dolby content is being muxed to MP4
  This is as per :
  
     * mp4ra : http://mp4ra.org/#/brands
  
     * Dolby Vision muxing spec (which is public) :
  
         https://professional.dolby.com/siteassets/content-creation/dolby-vision-for-content-creators/dolby_vision_bitstreams_within_the_iso_base_media_file_format_dec2017.pdf
  Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
  

  • [DH] libavformat/movenc.c
  • [DH] tests/ref/fate/copy-trac3074

• Crash in ffmpeg avcodec_free_context in one application but not in other

  5 novembre 2017, par geekowl

  I am building an application in C++ on Windows 10 using Microsoft Visual Studio 2012 Professional.

  I have created a wrapper library around ffmpeg (libavcodec) to encode video in H.264 format using libx264. This wrapper contains following functions :

  Initialize()
  
  Open()
  
  EncodeFrame()
  
  Close()
  
  Uninitialize()

  I created a test application to test the wrapper library. The test application works perfectly fine.

  When I use the wrapper library in my actual main application, the main application crashes in Close() API. Inside close, it crashes in avcodec_free_context(). The difference between the main application and the test application is that the main application links with some more dependent libraries that test application does not link with.

  To debug the problem in the main application, I put avcodec_free_context() in Open() after the context is allocated. The crash occurs if avcodec_free_context() is put at a certain point as shown below.

  pCodecContext = avcodec_alloc_context3(pCodec);
  
  
  
  // <---- No crash here.
  
  
  
  pCodecContext->bit_rate = 200000;
  
  pCodecContext->width = 320;
  
  pCodecContext->height = 240;
  
  .
  
  .
  
  .
  
  if (pCodec->id == AV_CODEC_ID_H264)
  
  {
  
      av_opt_set(pCodecContext->priv_data, "preset", "slow", 0);
  
      av_opt_set(pCodecContext->priv_data, "tune", "zerolatency", 0);
  
  }
  
  
  
  pCodecContext->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
  // <-- No crash here
  
  
  
  if (avcodec_open2(pCodecContext, pCodec, NULL) < 0)
  
  {
  
      return -1;
  
  }
  
  
  
  // <-- Crash here [avcodec_free_context(&pCodecContext);]

  What is a correct approach to identify and resolve this problem ?

  Thanks in advance.

  Update

  I found out that ffmpeg was built using gcc. That was causing the crash. I rebuilt ffmpeg using Visual Studio. That solved problem.