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• Electron ffmpeg integration

  27 avril 2017, par Raider Dave

  I am in way over my head here. I am normally a coldfusion/javascript/jquery developer but now have taken on a task that assumes I know more than I do.

  I am trying to write an application in electron that will allow me to select a group of video files and convert them to mp4 files while also compressing them. The files are football plays and a normal game consists of about 160 plays and 18gb. We need to compress these down to about 4gb. I have used programs like Prism to do this, but the intended users are not technically savvy nor do they all have windows - some have Macs.

  I have an electron project that I have started and got the first part to work. I can start the app and select the input files. But I have tried all kinds of different solutions found online to call ffmpeg and pass it the parms to convert a file. Is there an easy way to call ffmpeg with parms and then wait for it to finish before continuing ?

  I am on Windows 10 but will also need to run on Apple OS. Please, if you have a simple example of how to do this, I would appreciate it.

  Thanks !
  Dave

• Why do I catch the "AccessViolationException" exception in av_hwframe_transfer_data () when I run it as a windows service ?

  5 décembre 2024, par vakym

  I write Windows service witch decodig video stream from camera.
I write it on c# with FFMPEG.Autogen wrapper.

  



  My problem is "AccessViolationException" when i run it as service. 
If i run application as Console Application i have no exceptions.

  



  In Stacktrace i see this :

  



  в FFmpeg.AutoGen.ffmpeg+<>c.<.cctor>b__5_572(FFmpeg.AutoGen.AVFrame*, FFmpeg.AutoGen.AVFrame*, Int32)
в FFmpeg.AutoGen.ffmpeg.av_hwframe_transfer_data(FFmpeg.AutoGen.AVFrame*, FFmpeg.AutoGen.AVFrame*,Int32)
в VideoProviderService.VideoSources.RTSPVideoSource.TryDecodeNextFrame(Boolean ByRef)


  



  Code of TryDecodeNextFrame method :

  



  public IntPtr TryDecodeNextFrame(out bool state)
{
    try
    {
        ffmpeg.av_frame_unref(pFrame);
        ffmpeg.av_frame_unref(cpuFrame);
        int error;
        do
        {
            try
            {
                do
                {
                    timeout = DateTime.Now.AddSeconds(2);
                    error = ffmpeg.av_read_frame(_pFormatContext, pPacket);
                    if (error == ffmpeg.AVERROR_EOF)
                    {
                        state = false;
                        return IntPtr.Zero;
                    }
                    error.ThrowExceptionIfError();
                } while (pPacket->stream_index != _streamIndex);
                ffmpeg.avcodec_send_packet(pCodecContext, pPacket).ThrowExceptionIfError();
            }
            finally
            {
                ffmpeg.av_packet_unref(pPacket);
            }
            error = ffmpeg.avcodec_receive_frame(pCodecContext, pFrame);
        } while (error == ffmpeg.AVERROR(ffmpeg.EAGAIN));
        error.ThrowExceptionIfError();
        ffmpeg.av_hwframe_transfer_data(cpuFrame, pFrame, 0).ThrowExceptionIfError();
        ptrToFrame = (IntPtr)vfc.Convert(*cpuFrame).data[0];  
    }
    catch
    {
        state = false;
        return IntPtr.Zero;
    }
    state = true;
    return ptrToFrame;
}


  



  What i tried to do :

  



  

  1. I checked arguments of av_hwframe_transfer_data.

  


  2. I changed the user for the service.

  


  3. I tried compile as x86 or x64 configuration.

  


  



  I have no idea how to solve this.
Does anyone have any thoughts ?

  


• Anomalie #3609 (Fermé) : Problème avec les externals

  29 novembre 2015, par b b

  Il n’y a que 7 archives dans le XML et elles sont bien listées dans le privé sur la page du dépôt ecrire/ ?exec=depot&id_depot=X. Le problème est du côté de smart paquets, l’outil qui génère les xml du côté de la zone. Je ferme le ticket et t’invite à signaler le problème sur la liste spip-zone.