TROUBLESHOOTING
---------------

- video-thumbnailer

  On problems with the shotwell-video-thumbnailer you can
  switch to the ffmpegthumnailer. Please run as root:

  1. Backup /usr/lib/shotwell-video-thumbnailer:
     * mv /usr/lib/shotwell-video-thumbnailer /usr/lib/shotwell-video-thumbnailer.org

  2. Install ffmpegthumbnailer:
     * apt-get install ffmpegthumbnailer

  3. Create a new executable file:
     * touch /usr/lib/shotwell-video-thumbnailer
     * chmod  --reference=/usr/lib/shotwell-video-thumbnailer.org /usr/lib/shotwell-video-thumbnailer

  4. Write into the new file:
     * echo "#! /bin/bash" >/usr/lib/shotwell-video-thumbnailer
     * echo "ffmpegthumnailer -i \"$1\" -o -b -c png >>/usr/lib/shotwell-video-thumbnailer

  Or you can use the file replace_thumbnail.sh from the examples directory.

  Thanks to Teo Romera <teoromera@gmail.com>