Recherche avancée

Sur d’autres sites (3784)

• Merge pull request #1626 from Arkni/dev-dependency

  1er novembre 2015, par staabm

  Merge pull request #1626 from Arkni/dev-dependency
  Package.json : Upgrade dev-dependencies to latest versions
  

• AccessViolationException in ffmpeg (called from .NET with FFmpeg.AutoGen)

  13 septembre 2022, par zgabi

  I'm trying to "download"/stream an RTSP stream with FFmpeg.Autogen. I receive an AccessViolationException before the actual stream begins.

  


  I tried multiple FFmpeg and FFmpeg.AutoGen version (for example the latest stable FFMpeg version 5.1.1 from gyan.dev site and the latest FFmpeg.Autogen : 5.1.1). I also tried version 4.x (of course both ffmpeg and FFmpeg.AutoGen)

  


  This code works with a lot of Hikvision camera streams, I get the Access Violation with an expensive InfiRay thermal camera. (But anyway if it sends some corrupt data, ffmpeg should not crash.)

  


  My code is (this is only the initialization, since the problem occures there) :

  


  av_log_set_level(AV_LOG_DEBUG);

AVFormatContext* cf = null;

try
{
    cf = avformat_alloc_context();
    if (cf == null)
    {
        throw new Exception("Could not allocate the format context");
    }

    int probeSize = 32768 * 2;
    cf->probesize = probeSize;

    AVDictionary* options = null;
    string probeSizeStr = probeSize.ToString();
    av_dict_set(&options, "analyzeduration", probeSizeStr, 0);
    av_dict_set(&options, "probesize", probeSizeStr, 0);
    av_dict_set(&options, "rtsp_transport", "tcp", 0);

    string url =
        "rtsp://horizontetest:horizontetest@122.5.39.146:7828/cam/realmonitor?channel=1&subtype=1&unicast=true&proto=Onvif";
    int ret = avformat_open_input(&cf, url, null, &options);
    if (ret != 0)
    {
        throw new Exception("Could not open the input");
    }

    ret = avformat_find_stream_info(cf, &options);
    Console.WriteLine(probeSizeStr);
    if (ret < 0)
    {
        throw new Exception("Could not find stream info");
    }

    if (cf->streams == null)
    {
        throw new Exception("Could not find stream");
    }
}
finally
{
    if (cf != null)
    {
        avformat_close_input(&cf);
    }
}


  


  Access Violation occures in the avformat_find_stream_info call.

  


• FFMPEG [h264_nvenc @ 0x56151389fe00] Cannot get the preset configuration : invalid version (15)

  22 avril 2018, par Netheme

  i have issue with ffmpeg as usual :D. I have FFMPEG compiled (version N-90807-g00099ef0d0) with NVIDIA support (latest CUDA and latest NV Headers) :

  ffmpeg version N-90807-g00099ef0d0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-libnpp --enable-cuda --enable-cuvid --enable-nvenc --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --enable-gpl --enable-libx264 --disable-x86asm --enable-libx265 --enable-libfdk-aac --enable-nonfree --enable-x86asm
  
    libavutil      56. 15.100 / 56. 15.100
  
    libavcodec     58. 19.100 / 58. 19.100
  
    libavformat    58. 13.100 / 58. 13.100
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 19.100 /  7. 19.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

  When I try to run basic transcoding on GPU using command :

  ffmpeg -i 'udp://@239.100.0.1:331?fifo_size=‎100000000' -map i:0x100 -g 20 -vcodec  h264_nvenc -map i:0x101 -ab 128k -ar 48k -acodec aac -f mpegts udp://@239.0.0.1:1234?overrun_nonfatal_optin=

  I got this error :

      Input #0, mpegts, from 'udp://@239.100.0.1:331?fifo_size=‎100000000':
  
    Duration: N/A, start: 106.414400, bitrate: N/A
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1920x1080, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
  
      Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_nvenc))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [h264 @ 0x55a5edc45880] co located POCs unavailable
  
  [h264_nvenc @ 0x55a5edc45380] Cannot get the preset configuration: invalid version (15)
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  [aac @ 0x55a5edc46d40] Qavg: 227.785
  
  [aac @ 0x55a5edc46d40] 2 frames left in the queue on closing

  I have same version of FFMPEG compiled by the same way on another testing machine and there it is working. I tried to recompile/reinstall ffmpeg with the latest version, but result is the same.

  Does someone know what could be wrong on my instance ?
  Thanks.