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• Use Named Pipe (C++) to send images to FFMPEG

  28 août 2015, par user1829136

  I have the following code in C++ :

  #include <iostream>
  
  #include 
  
  #include <iostream>     // std::cout
  
  #include <fstream>      // std::ifstream
  
  #include <vector> 
  
  #include 
  
  
  
  using namespace std;
  
  
  
  int main(int argc, const char **argv)
  
  {
  
      wcout &lt;&lt; "Creating an instance of a named pipe..." &lt;&lt; endl;
  
  
  
      // Create a pipe to send data
  
      HANDLE pipe = CreateNamedPipe(
  
          L"\\\\.\\pipe\\my_pipe", // name of the pipe
  
          PIPE_ACCESS_OUTBOUND, // 1-way pipe -- send only
  
          PIPE_TYPE_BYTE, // send data as a byte stream
  
          1, // only allow 1 instance of this pipe
  
          0, // no outbound buffer
  
          0, // no inbound buffer
  
          0, // use default wait time
  
          NULL // use default security attributes
  
      );
  
  
  
      if (pipe == NULL || pipe == INVALID_HANDLE_VALUE) {
  
          wcout &lt;&lt; "Failed to create outbound pipe instance.";
  
          // look up error code here using GetLastError()
  
          system("pause");
  
          return 1;
  
      }
  
  
  
      wcout &lt;&lt; "Waiting for a client to connect to the pipe..." &lt;&lt; endl;
  
  
  
      // This call blocks until a client process connects to the pipe
  
      BOOL result = ConnectNamedPipe(pipe, NULL);
  
      if (!result) {
  
          wcout &lt;&lt; "Failed to make connection on named pipe." &lt;&lt; endl;
  
          // look up error code here using GetLastError()
  
          CloseHandle(pipe); // close the pipe
  
          system("pause");
  
          return 1;
  
      }
  
  
  
      wcout &lt;&lt; "Sending data to pipe..." &lt;&lt; endl;
  
  
  
      //opening file
  
      ifstream infile;
  
      infile.open("E:/xmen.jpg",std::ios::binary);
  
      ofstream out("E:/lelel.jpg",std::ios::binary);
  
  
  
      infile.seekg(0,std::ios::end);
  
      size_t file_size_in_byte = infile.tellg();
  
      vector<char> file_vec;
  
  
  
      file_vec.resize(file_size_in_byte);
  
  
  
      infile.seekg(0,std::ios::beg);
  
      infile.read(&amp;file_vec[0],file_size_in_byte);
  
  
  
      out.write(&amp;file_vec[0],file_vec.size());
  
  
  
      wcout&lt;/ This call blocks until a client process reads all the data
  
      DWORD numBytesWritten = 0;
  
      result = WriteFile(
  
          pipe, // handle to our outbound pipe
  
          &amp;file_vec[0], // data to send
  
          61026, // length of data to send (bytes)
  
          &amp;numBytesWritten, // will store actual amount of data sent
  
          NULL // not using overlapped IO
  
      );
  
  
  
  
  
      if (result) {
  
          wcout &lt;&lt; "Number of bytes sent: " &lt;&lt; numBytesWritten &lt;&lt; endl;
  
      } else {
  
          wcout &lt;&lt; "Failed to send data." &lt;&lt; endl;
  
          // look up error code here using GetLastError()
  
      }
  
  
  
      // Close the pipe (automatically disconnects client too)
  
      CloseHandle(pipe);
  
  
  
      wcout &lt;&lt; "Done." &lt;&lt; endl;
  
  
  
      system("pause");
  
      return 0;
  
  }
  
  </char></vector></fstream></iostream></iostream>

  Which I use to create a named pipe \.\pipe\my_pipe, to which FFMPEG connects to, using the following command :

  64-static\bin\Video>ffmpeg.exe -loop 1 -s 4cif -f image2 -y -i \\.\pipe\\my_pipe

  -r 25 -vframes 250 -vcodec rawvideo -an eaeew.mov

  Output :

  ffmpeg version N-54233-g86190af Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 27 2013 16:49:12 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib  libavutil      52. 37.101 / 52. 37.101
  
    libavcodec     55. 17.100 / 55. 17.100
  
    libavformat    55. 10.100 / 55. 10.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 77.101 /  3. 77.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [image2 @ 0000000003ee04a0] Could find no file with with path '\\.\pipe\\my_pipe
  
  ' and index in the range 0-4
  
  \\.\pipe\\my_pipe: No such file or directory

  I can see on my console that my C++ app received a connection, but I get the error above in FFMPEG. Can someone please advise ?

  EDIT 1
  Using the command below

  ffmpeg.exe -s 4cif -i \\.\pipe\my_pipe -r 25 -vframes 250 -vcodec rawvideo -an tess.mov

  I get the following output

  ffmpeg version N-54233-g86190af Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 27 2013 16:49:12 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 37.101 / 52. 37.101
  
    libavcodec     55. 17.100 / 55. 17.100
  
    libavformat    55. 10.100 / 55. 10.100
  
    libavdevice    55.  2.100 / 55.  2.100
  
    libavfilter     3. 77.101 /  3. 77.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  \\.\pipe\my_pipe: Invalid data found when processing input

  So, now it seems it was able to connect to the pipe but is not able to process the input.

• why ffmpeg is not working in new installation

  3 août 2013, par Hitesh Gupta

  I was working on live encoding from FFmpeg from last few days. One day I re-installed my OS and tried to run FFmpeg commands again after configuration. My publish points get in starting but could not started. Why ? Am I missing any configuration required ?

  The command I am trying to run is :

  ffmpeg -y -re -i D:\video2.mp4 -pix_fmt yuv420p -movflags isml+frag_keyframe -f ismv -threads 0 -c:v libx264 -preset fast -profile:v baseline -map 0:v -b:v:0 800k http://localhost/PPS/PublishPoint.isml/Streams(Encode
  
  r1)

  Output what I got in command prompt is :

  ffmpeg version N-54772-g53c853e Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jul 16 2013 22:25:42 with gcc 4.7.3 (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-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 40.100 / 52. 40.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 81.101 /  3. 81.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\video2.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf55.10.100
  
    Duration: 00:00:12.12, start: 0.072562, bitrate: 945 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 704x396 [
  
  SAR 1:1 DAR 16:9], 882 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 64
  
   kb/s
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [libx264 @ 00000000047e0860] using SAR=1/1
  
  [libx264 @ 00000000047e0860] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 00000000047e0860] profile Constrained Baseline, level 3.0
  
  [libx264 @ 00000000047e0860] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 r
  
  ef=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed
  
  _ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pski
  
  p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 deci
  
  mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyi
  
  nt=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=abr mbtree=1
  
   bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1
  
  :1.00
  
  Output #0, ismv, to 'http://localhost/My_SSMN_PPS/saturday.isml/Streams(Encoder1
  
  )':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf55.12.102
  
      Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 7
  
  04x396 [SAR 1:1 DAR 16:9], q=-1--1, 800 kb/s, 10000k tbn, 29.97 tbc
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=   13 fps=0.0 q=0.0 size=       2kB time=00:00:00.00 bitrate=N/A dup=2 dro
  
  frame=   29 fps= 29 q=0.0 size=       2kB time=00:00:00.00 bitrate=N/A dup=2 dro
  
  av_interleaved_write_frame(): Unknown error

  Advanced Thanks.

• ffmpef cannot open a simple microsoft wav file exported with Audacity

  23 juillet 2013, par sebpiq

  I have exported a sound file to microsoft wav using Audacity.
  I am trying to open this file with ffmpeg :

  ffmpeg -i steps-stereo-16b-44khz.wav /tmp/test.ogg

  and here's the ouput I get :

  fmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jun 12 2013 13:46:11 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass --enable-libbluray --enable-gnutls --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [dca @ 0x7fd30c013600] Not a valid DCA frame
  
  
  
  ... SNIP ...
  
  
  
  [dca @ 0x7fd5bc013600] Invalid bit allocation index
  
  [dca @ 0x7fd5bc013600] error decoding block
  
      Last message repeated 3 times
  
  [dca @ 0x7fd5bc013600] Didn't get subframe DSYNC
  
  [dca @ 0x7fd5bc013600] error decoding block
  
  [wav @ 0x7fd5bc013000] max_analyze_duration 5000000 reached at 5009070 microseconds
  
  [wav @ 0x7fd5bc013000] decoding for stream 0 failed
  
  [wav @ 0x7fd5bc013000] Could not find codec parameters for stream 0 (Audio: dts ([1][0][0][0] / 0x0001), 192000 Hz, 2 channels, fltp, 0 kb/s): no decodable DTS frames
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  steps-stereo-16b-44khz.wav: could not find codec parameters

  If I export the same file to .ogg or .aiff, no problem, the following works fine :

  ffmpeg -i steps-stereo-16b-44khz.aiff /tmp/test.ogg

  Any idea what could be wrong ?

  A link to my wav file so you can try to reproduce.

  NB my final goal is to slice the audio file. I know I can export file directly to .ogg with audacity. This is just a test case.