title: gphoto2 pipe:: Invalid data found when processing input
body: <p>So I have been following this tutorial <a href="https://medium.com/nerdery/dslr-webcam-setup-for-linux-9b6d1b79ae22" rel="nofollow noreferrer">https://medium.com/nerdery/dslr-webcam-setup-for-linux-9b6d1b79ae22</a> and when I got to the point to actually take a photo with the camera I have no issues but when I get to try to capture with it I get 
  <code>pipe:: Invalid data found when processing input</code></p>
  
  <p>The entire command is listed as follows:</p>
  
  <pre><code>$ gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video0
  Capturing preview frames as movie to 'stdout'. Press Ctrl-C to abort.
  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
    built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
    configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    libavutil      55. 78.100 / 55. 78.100
    libavcodec     57.107.100 / 57.107.100
    libavformat    57. 83.100 / 57. 83.100
    libavdevice    57. 10.100 / 57. 10.100
    libavfilter     6.107.100 /  6.107.100
    libavresample   3.  7.  0 /  3.  7.  0
    libswscale      4.  8.100 /  4.  8.100
    libswresample   2.  9.100 /  2.  9.100
    libpostproc    54.  7.100 / 54.  7.100
  ERROR: Movie capture error... Exiting.
  Movie capture finished (0 frames)
  pipe:: Invalid data found when processing input
  </code></pre>