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• Ffmpeg examples run in debug mode [on hold]

  25 août 2017, par Saeid Zangeneh

  I’m not so professional in c and cpp. I want to run FFmpeg official examples but there are many errors on include files. I can’t solve them.

  below output :when i try to run or debug the sample code

  debug output :

  cd '/home/saeid/NetBeansProjects/CppApplication_2'
  
  /usr/bin/make -f Makefile CONF=Debug
  
  "/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-  conf
  
  make[1]: Entering directory '/home/saeid/NetBeansProjects
  
  /CppApplication_2'
  
  
  
  "/usr/bin/make"  -f nbproject/Makefile-Debug.mk dist/Debug/GNU-
  
  Linux/cppapplication_2
  
  
  
  make[2]: Entering directory '/home/saeid/NetBeansProjects
  
  /CppApplication_2'
  
  
  
  mkdir -p dist/Debug/GNU-Linux
  
  
  
  gcc     -o dist/Debug/GNU-Linux/cppapplication_2 build/Debug/GNU-
  
  Linux/sample.o 
  
  
  
  build/Debug/GNU-Linux/sample.o: In function `select_channel_layout':
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:87: undefined 
  
  reference to `av_get_channel_layout_nb_channels'
  
  
  
  build/Debug/GNU-Linux/sample.o: In function `audio_encode_example':
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:112: undefined 
  
  reference to `avcodec_find_encoder'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:117: undefined 
  
  reference to `avcodec_alloc_context3'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:127: undefined 
  
  reference to `av_get_sample_fmt_name'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:134: undefined 
  
  reference to `av_get_channel_layout_nb_channels'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:136: undefined 
  
  reference to `avcodec_open2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:146: undefined 
  
  reference to `av_frame_alloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:156: undefined 
  
  reference to `av_samples_get_buffer_size'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:162: undefined 
  
  reference to `av_malloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:169: undefined 
  
  reference to `avcodec_fill_audio_frame'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:179: undefined 
  
  reference to `av_init_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:183: undefined 
  
  reference to `sin'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:189: undefined 
  
  reference to `avcodec_encode_audio2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:196: undefined 
  
  reference to `av_free_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:201: undefined 
  
  reference to `avcodec_encode_audio2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:208: undefined 
  
  reference to `av_free_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:212: undefined 
  
  reference to `av_freep'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:213: undefined 
  
  reference to `av_frame_free'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:214: undefined 
  
  reference to `avcodec_close'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:215: undefined 
  
  reference to `av_free'
  
  
  
  build/Debug/GNU-Linux/sample.o: In function `audio_decode_example':
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:229: undefined 
  
  reference to `av_init_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:232: undefined 
  
  reference to `avcodec_find_decoder'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:237: undefined 
  
  reference to `avcodec_alloc_context3'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:243: undefined 
  
  reference to `avcodec_open2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:254: undefined 
  
  reference to `av_free'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:264: undefined 
  
  reference to `av_frame_alloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:269: undefined 
  
  reference to `avcodec_decode_audio4'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:276: undefined 
  
  reference to `av_get_bytes_per_sample'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:305: undefined reference to `avcodec_close'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:306: undefined reference to `av_free'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:307: undefined reference to `av_frame_free'

  build/Debug/GNU-Linux/sample.o : In function `video_encode_example’ :

  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:323: undefined reference to `avcodec_find_encoder'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:328: undefined reference to `avcodec_alloc_context3'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:350: undefined reference to `av_opt_set'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:352: undefined reference to `avcodec_open2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:361: undefined reference to `av_frame_alloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:371: undefined reference to `av_image_alloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:379: undefined reference to `av_init_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:399: undefined reference to `avcodec_encode_video2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:407: undefined reference to `av_free_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:413: undefined reference to `avcodec_encode_video2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:421: undefined reference to `av_free_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:427: undefined reference to `avcodec_close'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:428: undefined reference to `av_free'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:429: undefined reference to `av_freep'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:430: undefined reference to `av_frame_free'
  
  
  
  build/Debug/GNU-Linux/sample.o: In function `decode_write_frame':
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:452: undefined reference to `avcodec_decode_video2'

  build/Debug/GNU-Linux/sample.o : In function `video_decode_example’ :

  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:481: undefined reference to `av_init_packet'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:486: undefined reference to `avcodec_find_decoder'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:491: undefined reference to `avcodec_alloc_context3'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:502: undefined reference to `avcodec_open2'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:511: undefined reference to `av_frame_alloc'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:545: undefined reference to `avcodec_close'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:546: undefined reference to `av_free'
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:547: undefined reference to `av_frame_free'
  
  
  
  build/Debug/GNU-Linux/sample.o: In function `main':
  
  
  
  /home/saeid/NetBeansProjects/CppApplication_2/sample.c:556: undefined 
  
  reference to `avcodec_register_all'
  
  
  
  collect2: error: ld returned 1 exit status
  
  
  
  nbproject/Makefile-Debug.mk:62: recipe for target 'dist/Debug/GNU-
  
  Linux/cppapplication_2' failed
  
  
  
  make[2]: *** [dist/Debug/GNU-Linux/cppapplication_2] Error 1
  
  
  
  make[2]: Leaving directory '/home/saeid/NetBeansProjects/CppApplication_2'
  
  
  
  nbproject/Makefile-Debug.mk:59: recipe for target '.build-conf' failed
  
  
  
  make[1]: *** [.build-conf] Error 2
  
  
  
  make[1]: Leaving directory '/home/saeid/NetBeansProjects/CppApplication_2'
  
  
  
  nbproject/Makefile-impl.mk:39: recipe for target '.build-impl' failed
  
  
  
  make: *** [.build-impl] Error 2

• Why my ffmpeg video encode codes does not work on other computer ?

  10 avril 2022, par Object Unknown

  I'm writing code to encode some cv::Mat images to a MP4 video. The program can run successfully in my computer which I developed it, but when I copied it (and all dlls it needs) to an other computer, it stopped work.

  


  The function which reporting error : (I got it from StackOverflow, and added some changes)

  


  int uns::VideoWriter::Remux()
{
    AVFormatContext* ifmt_ctx = NULL, * ofmt_ctx = NULL;
    int err = 0, ret = 0;
    int64_t ts = 0;
    AVStream* inVideoStream = NULL;
    AVStream* outVideoStream = NULL;
    if ((err = avformat_open_input(&ifmt_ctx, VIDEO_TMP_FILE.c_str(), 0, 0)) < 0)
    {
        if(callback != nullptr) 
            callback("[uns::VideoWriter/Remux] Failed to open input file for remuxing", err);
        ret = -1;
        goto end;
    }
    if ((err = avformat_find_stream_info(ifmt_ctx, 0)) < 0) 
    {
        if(callback != nullptr) 
            callback("[uns::VideoWriter/Remux] Failed to retrieve input stream information", err);
        ret = -2;
        goto end;
    }
    if ((err = avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, FINAL_FILE_NAME.c_str())))
    {
        if(callback != nullptr) 
            callback("[uns::VideoWriter/Remux] Failed to allocate output context", err);
        ret = -3;
        goto end;
    }
    inVideoStream = ifmt_ctx->streams[0];
    outVideoStream = avformat_new_stream(ofmt_ctx, NULL);
    if (!outVideoStream) 
    {
        if(callback != nullptr) 
            callback("[uns::VideoWriter/Remux] Failed to allocate output video stream", 0);
        ret = -4;
        goto end;
    }
    outVideoStream->time_base = { 1, fps };
    if ((err = avcodec_parameters_copy(outVideoStream->codecpar, inVideoStream->codecpar)) < 0)
    {
        if (callback != nullptr)
            callback("[uns::VideoWriter/Remux] Failed to copy stream information", err);
        return -4;
        goto end;
    }
    outVideoStream->codecpar->codec_tag = 0;
    if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) 
    {
        if ((err = avio_open(&ofmt_ctx->pb, FINAL_FILE_NAME.c_str(), AVIO_FLAG_WRITE)) < 0)
        {
            if(callback != nullptr) 
                callback("[uns::VideoWriter/Remux] Failed to open output file", err);
            ret = -5;
            goto end;
        }
    }
    ofmt_ctx->streams[0]->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
    ofmt_ctx->streams[0]->time_base.num = 1;
    ofmt_ctx->streams[0]->time_base.den = fps;
    if ((err = avformat_write_header(ofmt_ctx, 0)) < 0) 
    {
        if(callback != nullptr) 
            callback("[uns::VideoWriter/Remux] Failed to write header to output file", err);
        ret = -6;
        goto end;
    }
    AVPacket videoPkt;
    while (true) 
    {
        if ((err = av_read_frame(ifmt_ctx, &videoPkt)) < 0) 
        {
            break;
        }
        videoPkt.stream_index = outVideoStream->index;
        videoPkt.pts = ts;
        videoPkt.dts = ts;
        videoPkt.duration = av_rescale_q(videoPkt.duration, inVideoStream->time_base, outVideoStream->time_base);
        ts += videoPkt.duration;
        videoPkt.pos = -1;
        if ((err = av_interleaved_write_frame(ofmt_ctx, &videoPkt)) < 0) 
        {
            if(callback != nullptr) 
                callback("[uns::VideoWriter/Remux] Failed to mux packet", err);
            av_packet_unref(&videoPkt);
            break;
        }
        av_packet_unref(&videoPkt);
    }
    av_write_trailer(ofmt_ctx);
end:
    if (ifmt_ctx) 
    {
        avformat_close_input(&ifmt_ctx);
    }
    if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) 
    {
        avio_closep(&ofmt_ctx->pb);
    }
    if (ofmt_ctx) 
    {
        avformat_free_context(ofmt_ctx);
    }
    return ret;
}


  


  Notes :

  


  


  callback is a function which prints error messsage and error code.

  
The error I recived is [uns::VideoWriter/Remux] Failed to write header to output file, error code: -22

  


  


  I want to know what is causing this and how to resolve it please.

  


  Other Informations :

  


  


  Developing Env :

  


  


  OS : Windows 11 Professional Workstation build 22593.ni_release
  
IDE : Visual Studio 2022
  
ffmpeg : 4.4.1
  
Installed ffmpeg library :
ffmpeg[avcodec],ffmpeg[avdevice],ffmpeg[avfilter],ffmpeg[avfilter],ffmpeg[avformat],ffmpeg[openh264],ffmpeg[swresample],ffmpeg[swscale]
  
Compile Settings : x64 Release
  

  


  


  


  


  Running Env which causing error :

  


  


  OS : Windows Server 2019 DataCenter
  
With all dlls VS2022 copied to release folder

  


  


  


• Revision 3331 : On ajoute un accès à la configuration dans les menus

  25 avril 2010, par kent1 — Log

  On ajoute un accès à la configuration dans les menus