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• I need to install FFMPEG to Ubuntu 14.04 from Github using Composer. But it says Nothing to install or update

  23 août 2016, par ildar

  Recently i have installed composer and Ratchet. Everything worked fine but now i need to install FFMPEG through here. Json and Lock files were already been created and i just upgraded it. I have FFMPEG in .lock file and in JSON file (as it was told). So now, when i’m running

  ./composer.phar install 

  it is not installing and telling me

  Loading composer repositories with package information
  
  Installing dependencies (including require-dev) from lock file
  
  Nothing to install or update
  
  Generating autoload files

  What is wrong with this installer ?

• How to install php7-ffmpeg from source on Ubuntu 14.04

  10 août 2016, par amachree tamunoemi

  PHP7 is installed from source due to pthreads. On the same source I wish to install php7-ffmpeg.

  In order to do so, I installed php7-ffmpeg in "ext" folder of php-src and then change directory to php7-ffmpeg to run Configure script with

  ./configure && make

  When run I had ffmpeg header not found error but did the following to solve the ffmpeg header not found error

  sudo cp php-src/ext/php7-ffmpeg/libavcodec/* /usr/local/include/ffmpeg
  
  sudo cp php-src/ext/php7-ffmpeg/libavdevice/* /usr/local/include/ffmpeg
  
  sudo cp php-src/ext/php7-ffmpeg/libavformat/* /usr/local/include/ffmpeg
  
  sudo cp php-src/ext/php7-ffmpeg/libavutil/* /usr/local/include/ffmpeg
  
  sudo cp php-src/ext/php7-ffmpeg/libswscale/* /usr/local/include/ffmpeg

  Now I am having the following error

  checking for ffmpeg libavcodec.so... 
  
  ffmpeg shared libraries not found. Make sure ffmpeg is compiled as shared libraries
  
  using --enable-shared option

  Though I can find the ffmpeg libraries under /usr/lib/i386-linux-gnu folder.

  I’ve also done this below :

  echo "/usr/local/lib" >> /etc/ld.so.conf
  
  echo "/usr/lib" >> /etc/ld.so.conf
  
  ldconfig

  to solve the ffmpeg shared libraries not found error but yet I can’t install php7-ffmpeg.

  Please I need help on how to install php7-ffmpeg.

• cannot resolve variable PIX_FMT_RGB24, ffmpeg source code install with the newest version [duplicate]

  10 août 2016, par NacyL

  This question already has an answer here :

  • FFMPEG : ‘PIX_FMT_BGR24’ was not declared in this scope
    
    1 answer
    

  i installed the ffmpeg from source code according https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu, and write a test file to save ppm file from a video, but the code cannot reslove PIX_FMT_RGB24, i write the code as below :

  int main() {
  
      // Initalizing these to NULL prevents segfaults!
  
      AVFormatContext   *pFormatCtx = NULL;
  
      int               i, videoStream;
  
      AVCodecContext    *pCodecCtxOrig = NULL;
  
      AVCodecContext    *pCodecCtx = NULL;
  
      AVCodec           *pCodec = NULL;
  
      AVFrame           *pFrame = NULL;
  
      AVFrame           *pFrameRGB = NULL;
  
      AVPacket          packet;
  
      int               frameFinished;
  
      int               numBytes;
  
      uint8_t           *buffer = NULL;
  
      struct SwsContext *sws_ctx = NULL;
  
  
  
      const char* url = "/home/liulijuan/bin/test.mp4";
  
  
  
      // [1] Register all formats and codecs
  
      av_register_all();
  
  
  
      // [2] Open video file
  
      if(avformat_open_input(&pFormatCtx, url, NULL, NULL)!=0)
  
          return -1; // Couldn't open file
  
  
  
      // [3] Retrieve stream information
  
      if(avformat_find_stream_info(pFormatCtx, NULL)<0)
  
          return -1; // Couldn't find stream information
  
  
  
      // Dump information about file onto standard error
  
      av_dump_format(pFormatCtx, 0, url, 0);
  
  
  
      // Find the first video stream
  
      videoStream=-1;
  
      for(i=0; inb_streams; i++)
  
          if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
  
              videoStream=i;
  
              break;
  
          }
  
      if(videoStream==-1)
  
          return -1; // Didn't find a video stream
  
  
  
      // Get a pointer to the codec context for the video stream
  
      pCodecCtxOrig=pFormatCtx->streams[videoStream]->codec;
  
      // Find the decoder for the video stream
  
      pCodec=avcodec_find_decoder(pCodecCtxOrig->codec_id);
  
      if(pCodec==NULL) {
  
          fprintf(stderr, "Unsupported codec!\n");
  
          return -1; // Codec not found
  
      }
  
      // Copy context
  
      pCodecCtx = avcodec_alloc_context3(pCodec);
  
      if(avcodec_copy_context(pCodecCtx, pCodecCtxOrig) != 0) {
  
          fprintf(stderr, "Couldn't copy codec context");
  
          return -1; // Error copying codec context
  
      }
  
  
  
      // Open codec
  
      if(avcodec_open2(pCodecCtx, pCodec, NULL)<0)
  
          return -1; // Could not open codec
  
  
  
      // Allocate video frame
  
      pFrame=av_frame_alloc();
  
  
  
      // Allocate an AVFrame structure
  
      pFrameRGB=av_frame_alloc();
  
      if(pFrameRGB==NULL)
  
          return -1;
  
  
  
      // Determine required buffer size and allocate buffer
  
      numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,
  
                                  pCodecCtx->height);
  
      buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
  
  
  
      // Assign appropriate parts of buffer to image planes in pFrameRGB
  
      // Note that pFrameRGB is an AVFrame, but AVFrame is a superset
  
      // of AVPicture
  
      avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,
  
                     pCodecCtx->width, pCodecCtx->height);
  
  
  
      // initialize SWS context for software scaling
  
      sws_ctx = sws_getContext(pCodecCtx->width,
  
                               pCodecCtx->height,
  
                               pCodecCtx->pix_fmt,
  
                               pCodecCtx->width,
  
                               pCodecCtx->height,
  
                               PIX_FMT_RGB24,
  
                               SWS_BILINEAR,
  
                               NULL,
  
                               NULL,
  
                               NULL
  
      );
  
  
  
      // [4] Read frames and save first five frames to disk
  
      i=0;
  
      while(av_read_frame(pFormatCtx, &packet)>=0) {
  
          // Is this a packet from the video stream?
  
          if(packet.stream_index==videoStream) {
  
              // Decode video frame
  
              avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
  
  
              // Did we get a video frame?
  
              if(frameFinished) {
  
                  // Convert the image from its native format to RGB
  
                  sws_scale(sws_ctx, (uint8_t const * const *)pFrame->data,
  
                            pFrame->linesize, 0, pCodecCtx->height,
  
                            pFrameRGB->data, pFrameRGB->linesize);
  
  
  
                  // Save the frame to disk
  
                  if(++i<=5)
  
                      SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height,
  
                                i);
  
              }
  
          }
  
  
  
          // Free the packet that was allocated by av_read_frame
  
          av_free_packet(&packet);
  
      }
  
  
  
      // Free the RGB image
  
      av_free(buffer);
  
      av_frame_free(&pFrameRGB);
  
  
  
      // Free the YUV frame
  
      av_frame_free(&pFrame);
  
  
  
      // Close the codecs
  
      avcodec_close(pCodecCtx);
  
      avcodec_close(pCodecCtxOrig);
  
  
  
      // Close the video file
  
      avformat_close_input(&pFormatCtx);
  
  
  
      return 0;
  
  }

  so i replace PIX_FMT_RGB24 with AV_PIX_FMT_RGB24, but i cannot open the saved ppm file, the save code as below :

  void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame) {
  
      FILE *pFile;
  
      char szFilename[32];
  
      int  y;
  
  
  
      printf("start save frame ...\n");
  
      // Open file
  
      sprintf(szFilename, "/home/liulijuan/frame%d.ppm", iFrame);
  
      pFile=fopen(szFilename, "wb");
  
      if(pFile==NULL)
  
          return;
  
  
  
      printf("start write header ...\n");
  
      // Write header
  
      fprintf(pFile, "/P6\n%d %d\n255\n", width, height);
  
  
  
      // Write pixel data
  
      for(y=0; ydata[0]+y*pFrame->linesize[0], 1, width*3, pFile);
  
  
  
      // Close file
  
      fclose(pFile);
  
      printf("close file ...\n");
  
  }

  so, what’s wrong with this code ?