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• how to set android's camera as the input of ffmpeg

  5 mai 2017, par Harrison

  I managed to run ffmpeg in Android Studio project, but don’t know how to set the Android’s camera as the input of ffmpeg. Is it possible now ?

  If not, is there some open-sourced projects that can get Android’s camera and turn the phone to a rtsp server ? Then I can use ffmpeg to get that rtsp link.

  Really appreciate it if some suggestions about this, thanks.

• FFMpeg End of file error while reading a live feed

  23 juillet 2020, par Summit

  i am streaming a RTMP feed from obs studio i can watch that feed in VLC player.

  


  When using FFMpeg in visual studio project i get the End of file error.

  


  this is my function and to simplify it i have not included the error handling in this code.

  


  Why do i get End of file error in the RTMP feed and how can i correct it.

  


  bool load_frame()
{

    AVFormatContext *av_format_ctx = avformat_alloc_context();
    avformat_open_input(&av_format_ctx, "rtmp://192.168.1.2/live/sumit", NULL, NULL);
    avformat_find_stream_info(av_format_ctx , NULL);
    
    AVCodecParameters* av_codec_params = nullptr;
    AVCodec* av_codec = nullptr;
    int video_stream_index = -1;
    for (unsigned int i = 0; i < av_format_ctx->nb_streams; i++) {
         auto stream = av_format_ctx->streams[i];
        av_codec_params = av_format_ctx->streams[i]->codecpar;
        av_codec = avcodec_find_decoder(av_codec_params->codec_id);     
        if (av_codec_params->codec_type == AVMEDIA_TYPE_VIDEO)
        {
            video_stream_index = i;
            break;
        }
    }
    // set up codec context for the decoder
    AVCodecContext* av_codec_ctx = avcodec_alloc_context3(av_codec);
    avcodec_parameters_to_context(av_codec_ctx, av_codec_params) ;
    avcodec_open2(av_codec_ctx, av_codec, NULL);
    AVFrame* av_frame = av_frame_alloc();
    AVPacket* av_packet = av_packet_alloc();
    int response;
    while (av_read_frame(av_format_ctx, av_packet) >= 0) {
        if (av_packet->stream_index != video_stream_index) {
            continue;
        }
        response = avcodec_send_packet(av_codec_ctx, av_packet);
        if (response < 0) {
            std::cout << "Failed to decode the packet";
            return false;
        }
        response =  avcodec_receive_frame(av_codec_ctx, av_frame);

        if (response == AVERROR(EAGAIN) || response == AVERROR_EOF) {
            std::cout << "End of file";   // i get this error
            continue;
        }
        else if (response < 0) {
            std::cout << "Failed to decode the packet";
            return false;
        }
        av_packet_unref(av_packet);
        break;
    }
    
    avformat_close_input(&av_format_ctx);
    avformat_free_context(av_format_ctx);
    av_frame_free(&av_frame);
    av_packet_free(&av_packet);
    avcodec_free_context(&av_codec_ctx);
    
    return true;
}


  


• C++/CLI — 0xc000007b (INVALID_IMAGE_FORMAT) with /clr option on

  9 mars 2015, par OverMachoGrande

  I’m trying to build a C++/CLI executable to which I statically link ffmpeg (libavcodec, libavformat, libavutil & swscale). It works fine if I build it normally (without /clr, so no CLR support), it works. However, when I add CLR support, it won’t start up with a 0xc000007b. A "Hello World" C++/CLI app runs fine, though.

  Supposedly the same thing happens with Boost::Threads, but since ffmpeg is pure C, I doubt it’s using Boost.

  My config :

  • Visual Studio 2008 Professional SP1
  • Windows XP Pro SP3 (x86)
  • .NET Framework 3.5 SP1

  Thanks,
  Robert