title: Getting 'av_interleaved_write_frame(): Broken pipe' error
body: <p>I am trying this blog post.I am new to python, numpy as well as FFMPEG. I could not figure out what causes this issue.</p>
  
  <p><a href="http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/" rel="noreferrer">http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/</a></p>
  
  <p>here is the code:</p>
  
  <pre><code>import subprocess as sp
  import numpy
  
  print ("Hello World!");
  FFMPEG_BIN = "ffmpeg" # on Linux ans Mac OS
  #FFMPEG_BIN = "ffmpeg.exe" # on Windows
  
  command = [ FFMPEG_BIN,
              '-i', '/Users/eananthaneshan/Movies/myvideo.mp4',
              '-f', 'image2pipe',
              '-pix_fmt', 'yuv444p',
              '-s', '420x360',
              '-r', '24',
              '-vcodec', 'h264', '-']
  pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=-1)
  
  # read 420*360*3 bytes (= 1 frame)
  raw_image = pipe.stdout.read(420*360*3)
  # transform the byte read into a numpy array
  image =  numpy.fromstring(raw_image, dtype='uint8')
  image = image.reshape((360,420,3)   )
  # throw away the data in the pipe's buffer.
  pipe.stdout.flush()
  </code></pre>
  
  <p>This is the output:</p>
  
  <pre><code>ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
    built with Apple LLVM version 7.0.0 (clang-700.0.72)
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
    libavutil      54. 31.100 / 54. 31.100
    libavcodec     56. 60.100 / 56. 60.100
    libavformat    56. 40.101 / 56. 40.101
    libavdevice    56.  4.100 / 56.  4.100
    libavfilter     5. 40.101 /  5. 40.101
    libavresample   2.  1.  0 /  2.  1.  0
    libswscale      3.  1.101 /  3.  1.101
    libswresample   1.  2.101 /  1.  2.101
    libpostproc    53.  3.100 / 53.  3.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/eananthaneshan/Movies/myvideo.mp4':
    Metadata:
      major_brand     : isom
      minor_version   : 1
      compatible_brands: isom
      creation_time   : 2014-04-07 02:02:31
    Duration: 01:00:10.03, start: 0.000000, bitrate: 1024 kb/s
      Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 111 kb/s (default)
      Metadata:
        creation_time   : 2014-04-07 02:02:31
        handler_name    : GPAC ISO Audio Handler
      Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/unknown), 720x404, 909 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
      Metadata:
        creation_time   : 2014-04-07 01:14:58
        handler_name    : L-SMASH Video Media Handler
        encoder         : AVC Coding
  Output #0, image2pipe, to 'pipe:':
    Metadata:
      major_brand     : isom
      minor_version   : 1
      compatible_brands: isom
      encoder         : Lavf56.40.101
      Stream #0:0(und): Video: rawvideo (444P / 0x50343434), yuv444p, 420x360, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
      Metadata:
        creation_time   : 2014-04-07 01:14:58
        handler_name    : L-SMASH Video Media Handler
        encoder         : Lavc56.60.100 rawvideo
  Stream mapping:
    Stream #0:1 -&gt; #0:0 (h264 (native) -&gt; rawvideo (native))
  Press [q] to stop, [?] for help
  av_interleaved_write_frame(): Broken pipe
  frame=    2 fps=0.0 q=-0.0 Lsize=     886kB time=00:00:00.08 bitrate=87003.8kbits/s    
  video:886kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
  Conversion failed!
  </code></pre>