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• ffmpeg av_interleaved_write_frame() : Broken pipe under windows

  7 avril 2016, par Allen

  I am using ffmpeg to convert original media file to rawvideo yuv format, ouputed the yuv to pipe, then my command tool receive the raw yuv as input, do some processing.

  e.g :

  D:\huang_xuezhong\build_win32_VDNAGen>ffmpeg -i test.mkv -c:v rawvideo -s 320x240 -f rawvideo - | my_tool -o output

  every time, when run the command, ffmpeg will dump this av_interleaved_write_frame(): Broken pipe error msg :

  Output #0, rawvideo, to 'pipe:':
  
    Metadata:
  
    encoder         : Lavf56.4.101
  
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 120:91 DAR 160:91], q=2-31, 200 kb/s, 24 fps, 24 tbn, 24 tbc (default)
  
    Metadata:
  
        encoder         : Lavc56.1.100 rawvideo
  
    Stream mapping:
  
        Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
  
  Press [q] to stop, [?] for help
  
  av_interleaved_write_frame(): Broken pipe
  
  frame=    1 fps=0.0 q=0.0 Lsize=     112kB time=00:00:00.04 bitrate=22118.2kbits/s
  
  video:112kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing o
  
  verhead: 0.000000%
  
  Conversion failed!

  in my souce code : it take stdin as the input file, every time, it read a frame size content from it, if the content read is less than a frame size, then continue read, until a frame is fetched, then it use the frame content to generate something.

  int do_work (int jpg_width, int jpg_height) 
  
  {
  
  int ret = 0;
  
  
  
  FILE *yuv_fp = NULL;
  
  unsigned char * yuv_buf = NULL;
  
  int frame_size = 0;
  
  int count = 0;
  
  int try_cnt = 0;
  
  
  
  frame_size = jpg_width * jpg_height * 3 / 2;
  
  va_log (vfp_log, "a frame size:%d\n", frame_size);
  
  
  
  yuv_fp = stdin;
  
  
  
  yuv_buf = (unsigned char *) aligned_malloc_int(
  
          sizeof(char) * (jpg_width + 1) * (jpg_height + 1) * 3, 128);
  
  
  
  if (!yuv_buf) {
  
      fprintf (stderr, "malloc yuv buf error\n");
  
      goto end;
  
  } 
  
  
  
  memset (yuv_buf, 0, frame_size);
  
  while (1) {
  
  
  
      try_cnt++;
  
      va_log (vfp_log, "try_cnt is %d\n", try_cnt);
  
  
  
      //MAX_TRY_TIMES = 10
  
      if (try_cnt > MAX_TRY_TIMES) {
  
          va_log (vfp_log, "try time out\n");
  
          break;
  
      }
  
  
  
      count = fread (yuv_buf + last_pos, 1, frame_size - last_pos, yuv_fp);
  
      if (last_pos + count < frame_size) {
  
          va_log (vfp_log, "already read yuv: %d, this time:%d\n", last_pos + count, count);
  
          last_pos += count;
  
          continue;
  
      }
  
  
  
      // do my work here
  
  
  
      memset (yuv_buf, 0, frame_size);
  
      last_pos = 0;
  
      try_cnt = 0;
  
  }
  
  
  
  end:
  
  if (yuv_buf) {
  
      aligned_free_int (yuv_buf);
  
  }
  
  
  
  return ret;
  
  }

  my log :

  2016/04/05 15:20:38 : a frame size:115200
  2016/04/05 15:20:38 : try_cnt is 1
  2016/04/05 15:20:38 : already read yuv : 49365, this time:49365
  2016/04/05 15:20:38 : try_cnt is 2
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 3
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 4
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 5
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 6
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 7
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 8
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 9
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 10
  2016/04/05 15:20:38 : already read yuv : 49365, this time:0
  2016/04/05 15:20:38 : try_cnt is 11
  2016/04/05 15:20:38 : try time out
  ```

  my question :

  when piping used ,does ffmpeg write content to pipe buffer as soon as it has content, or it will buffer some size content, then flushes them to pipe ?Maybe some internal logic that I misunderstood,any one could help explain or fix my code ?

  PS : this command run ok under linux.

• error in ffmpeg when sending image from pipe via php

  12 décembre 2013, par Abdul Ali

  used the following tutorial to send an uploaded image to ffmpeg from php via pipe.

  Image pipe from php to ffmpeg

  however it raises an eror saying that the pipe has invalid data in it.

  pipe:: Invalid data found when processing input

  following is the php code for uploading an image file

  $tempPath = $_FILES['vdofile']['tmp_name'];
  
  
  
  print_r($tempPath);
  
  
  
  $descriptorspec = array(
  
      0 => array("pipe", "r"), // stdin is a pipe that the child will read from
  
      1 => array("pipe", "w"), // stdout is a pipe that the child will write to
  
      2 => array("file", "error-output.txt", "a") // stderr is a file to write to
  
      );
  
  
  
  $img = imagecreatefromjpeg($tempPath);
  
  
  
   $proc = proc_open("ffmpeg image2pipe -i - -y image.jpg", $descriptorspec, $pipes);
  
  
  
   if (is_resource($proc)) {     
  
       /*
  
        * $pipes[0] = write something to command being run
  
        * $pipes[1] = read something from command
  
        * $pipes[2] = error from command 
  
        */
  
         fwrite($pipes[0], $_FILES['vdofile']['tmp_name']);
  
         fclose($pipes[0]);
  
   }
  
   proc_close($proc);
  
  ?>

  and simple html uploading code is as follows :

   <form action="upload.php" method="post" enctype="multipart/form-data">
  
          <input type="file" />
  
  
  
          <input type="submit" value="Upload" />
  
      </form>

  the error file generated is as follows :

      ffmpeg version N-58485-ga12b4bd Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov 26 2013 22:07:02 with gcc 4.8.2 (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-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 55.100 / 52. 55.100
  
    libavcodec     55. 44.100 / 55. 44.100
  
    libavformat    55. 21.102 / 55. 21.102
  
    libavdevice    55.  5.101 / 55.  5.101
  
    libavfilter     3. 91.100 /  3. 91.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  pipe:: Invalid data found when processing input

  any assistance will be appreciated.

  **

  EDIT

  **

  the code still produces an error :

      ffmpeg version N-58485-ga12b4bd Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov 26 2013 22:07:02 with gcc 4.8.2 (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-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 55.100 / 52. 55.100
  
    libavcodec     55. 44.100 / 55. 44.100
  
    libavformat    55. 21.102 / 55. 21.102
  
    libavdevice    55.  5.101 / 55.  5.101
  
    libavfilter     3. 91.100 /  3. 91.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [image2pipe @ 00000000029ee0a0] Could not find codec parameters for stream 0 (Video: none): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  pipe:: could not find codec parameters

  the following ffmpeg comand is called from within php like above :

  ffmpeg -f image2pipe -i - -vcodec mjpeg -vframes 1 -an -f mjpeg image.mp4

• Updated version number.

  8 avril 2013, par blueimp

  m server/php/UploadHandler.php
  

  Updated version number.