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• How to overlay swf files on a video

  17 décembre 2015, par Harsha Vardhan

  Hi recently I started working with ffmpeg, there I overlay-ed images as well as gif files on videos. Where coming to swf files ffmpeg is unable to recognize that format.

  I tried below command for overlaying :

  ffmpeg -i vid.mp4 -i swf.swf -filter_co
  
  mplex overlay=x=100:y=100:shortest=1  -q 15 -vcodec libx264 out.mp4
  
  ffmpeg version N-76822-g12a419d Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 5.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
  
  enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55.  9.100 / 55.  9.100
  
    libavcodec     57. 16.100 / 57. 16.100
  
    libavformat    57. 19.100 / 57. 19.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 15.100 /  6. 15.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vid.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp42avc1
  
      creation_time   : 2009-03-02 14:42:39
  
    Duration: 00:00:10.56, start: 0.000000, bitrate: 663 kb/s
  
      Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, flt
  
  p, 125 kb/s (default)
  
      Metadata:
  
        creation_time   : 2009-03-02 14:42:39
  
        handler_name    : Apple Sound Media Handler
  
      Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
  
  v420p(tv, smpte170m/smpte170m/bt709), 480x360, 196 kb/s, 24 fps, 24 tbr, 600 tbn
  
  , 1200 tbc (default)
  
      Metadata:
  
        creation_time   : 2009-03-02 14:42:40
  
        handler_name    : Apple Video Media Handler
  
      Stream #0:2(eng): Data: none (rtp  / 0x20707472), 202 kb/s
  
      Metadata:
  
        creation_time   : 2009-03-02 14:42:40
  
        handler_name    : hint media handler
  
      Stream #0:3(eng): Data: none (rtp  / 0x20707472), 129 kb/s
  
      Metadata:
  
        creation_time   : 2009-03-02 14:42:40
  
        handler_name    : hint media handler
  
  [swf @ 00000098cdb9e000] Could not find codec parameters for stream 0 (Audio: pc
  
  m_u8, 5512 Hz, mono, 44 kb/s): unspecified sample format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #1, swf, from 'swf.swf':
  
    Duration: 00:00:04.90, bitrate: 196 kb/s
  
      Stream #1:0: Audio: pcm_u8, 5512 Hz, mono, 44 kb/s
  
      Stream #1:1: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:2: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:3: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:4: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:5: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:6: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
      Stream #1:7: Audio: mp3, 11025 Hz, mono, s16p, 16 kb/s
  
  Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay
  
  _0

  Any one please suggest me, how to resolve this issue or even getting frames from swf format files by using ffmpeg or any other similar tools.

• how to change the frame rate and capturing image size from IP camera

  6 décembre 2015, par rockycai

  Now I have a IP camera and I want to capture image from it through RTSP.I use below code and it works well.But the camera’s frame rate is 25/s.So I got a lot of images per second.I don’t want it.And per image is 6.2MB.I also don’t want need to get high quality image.What can I do to slower the frame rate and smaller the size of image ?

  #ifndef INT64_C
  
  #define INT64_C(c) (c ## LL)
  
  #define UINT64_C(c) (c ## ULL)
  
  #endif
  
  
  
  #ifdef __cplusplus
  
  extern "C" {
  
  #endif
  
      /*Include ffmpeg header file*/
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  #include 
  
  #ifdef __cplusplus
  
  }
  
  #endif
  
  
  
  #include 
  
  
  
  
  
  static void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame);
  
  
  
  int main (int argc, const char * argv[])
  
  {
  
      AVFormatContext *pFormatCtx;
  
      int             i, videoStream;
  
      AVCodecContext  *pCodecCtx;
  
      AVCodec         *pCodec;
  
      AVFrame         *pFrame; 
  
      AVFrame         *pFrameRGB;
  
      AVPacket        packet;
  
      int             frameFinished;
  
      int             numBytes;
  
      uint8_t         *buffer;
  
  
  
      // Register all formats and codecs
  
      av_register_all();
  
  //  const char *filename="C:\libraries\gfjyp.avi";
  
      // Open video file
  
      //AVDictionary *options = NULL;
  
      //av_dict_set(&amp;options,"rtsp_transport","tcp",0);
  
      if(av_open_input_file(&amp;pFormatCtx, argv[1], NULL, 0, NULL)!=0)
  
          return -1; // Couldn't open file
  
  
  
      // Retrieve stream information
  
      if(av_find_stream_info(pFormatCtx)&lt;0)
  
          return -1; // Couldn't find stream information
  
  
  
      // Dump information about file onto standard error
  
      dump_format(pFormatCtx, 0, argv[1], false);
  
  
  
      // 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
  
          pCodecCtx=pFormatCtx->streams[videoStream]->codec;
  
  
  
          // Find the decoder for the video stream
  
          pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
  
          if(pCodec==NULL)
  
              return -1; // Codec not found
  
  
  
          // Open codec
  
          if(avcodec_open(pCodecCtx, pCodec)&lt;0)
  
              return -1; // Could not open codec
  
  
  
          // Hack to correct wrong frame rates that seem to be generated by some codecs
  
  
  
          if(pCodecCtx->time_base.num>1000 &amp;&amp; pCodecCtx->time_base.den==1)
  
              pCodecCtx->time_base.den=1000;
  
  
  
          //pCodecCtx->time_base.den=1;
  
          //pCodecCtx->time_base.num=1;
  
          // Allocate video frame
  
          pFrame=avcodec_alloc_frame();
  
  
  
          // Allocate an AVFrame structure
  
          pFrameRGB=avcodec_alloc_frame();
  
          if(pFrameRGB==NULL)
  
              return -1;
  
  
  
          // Determine required buffer size and allocate buffer
  
          numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,
  
              pCodecCtx->height);
  
  
  
          //buffer=malloc(numBytes);
  
          buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
  
  
  
          // Assign appropriate parts of buffer to image planes in pFrameRGB
  
          avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,
  
              pCodecCtx->width, pCodecCtx->height);
  
  
  
          // Read frames and save first five frames to disk
  
          i=0;
  
          while(av_read_frame(pFormatCtx, &amp;packet)>=0)
  
          {
  
              // Is this a packet from the video stream?
  
              if(packet.stream_index==videoStream)
  
              {
  
                  // Decode video frame
  
                  avcodec_decode_video2(pCodecCtx, pFrame, &amp;frameFinished, 
  
                      &amp;packet);
  
  
  
                  // Did we get a video frame?
  
                  if(frameFinished)
  
                  {
  
  
  
                      static struct SwsContext *img_convert_ctx;
  
  
  
  #if 0
  
                      // Older removed code
  
                      // Convert the image from its native format to RGB swscale
  
                      img_convert((AVPicture *)pFrameRGB, PIX_FMT_RGB24, 
  
                          (AVPicture*)pFrame, pCodecCtx->pix_fmt, pCodecCtx->width, 
  
                          pCodecCtx->height);
  
  
  
                      // function template, for reference
  
                      int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
  
                          int srcSliceH, uint8_t* dst[], int dstStride[]);
  
  #endif
  
                      // Convert the image into YUV format that SDL uses
  
                      if(img_convert_ctx == NULL) {
  
                          int w = pCodecCtx->width;
  
                          int h = pCodecCtx->height;
  
  
  
                          img_convert_ctx = sws_getContext(w, h, 
  
                              pCodecCtx->pix_fmt, 
  
                              w, h, PIX_FMT_RGB24, SWS_BICUBIC,
  
                              NULL, NULL, NULL);
  
                          if(img_convert_ctx == NULL) {
  
                              fprintf(stderr, "Cannot initialize the conversion context!\n");
  
                              exit(1);
  
                          }
  
                      }
  
                      int ret = sws_scale(img_convert_ctx, pFrame->data, pFrame->linesize, 0, 
  
                          pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);
  
  #if 0 
  
                      // this use to be true, as of 1/2009, but apparently it is no longer true in 3/2009
  
                      if(ret) {
  
                          fprintf(stderr, "SWS_Scale failed [%d]!\n", ret);
  
                          exit(-1);
  
                      }
  
  #endif
  
  
  
                      // Save the frame to disk
  
                      if(i++&lt;=1000)
  
                          SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, i);
  
                  }
  
              }
  
  
  
              // Free the packet that was allocated by av_read_frame
  
              av_free_packet(&amp;packet);
  
              //sleep(1);
  
          }
  
  
  
          // Free the RGB image
  
          //free(buffer);
  
          av_free(buffer);
  
          av_free(pFrameRGB);
  
  
  
          // Free the YUV frame
  
          av_free(pFrame);
  
  
  
          // Close the codec
  
          avcodec_close(pCodecCtx);
  
  
  
          // Close the video file
  
          av_close_input_file(pFormatCtx);
  
  
  
          return 0;
  
  }
  
  
  
  static void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame)
  
  {
  
      FILE *pFile;
  
      char szFilename[32];
  
      int  y;
  
  
  
      // Open file
  
      sprintf(szFilename, "frame%d.ppm", iFrame);
  
      pFile=fopen(szFilename, "wb");
  
      if(pFile==NULL)
  
          return;
  
  
  
      // 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);
  
  }

• Class FFMPEG not found on Webfaction

  28 janvier 2016, par Luan Gabriel

  I’m trying to use FFMPEG on my application but its no working. The FFMPEG its install in my server (WebFaction) :

  FFmpeg version UNKNOWN, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration : —enable-gpl —enable-libamr-nb —enable-libamr-wb —enable-libfaac —enable-libfaad —enable-libmp3lame —enable-nonfree
  libavutil 49.14. 0 / 49.14. 0
  libavcodec 52.15. 0 / 52.15. 0
  libavformat 52.28. 0 / 52.28. 0
  libavdevice 52. 1. 0 / 52. 1. 0
  built on Jan 9 2015 12:30:52, gcc : 4.8.2 20140120 (Red Hat 4.8.2-16)

  But when I tried to do $mov = new ffmpeg_movie($movie); its showing me a error message : Class 'ffmpeg_movie' not found(...)

  Any ideas ?