http://zenway.ru/page/screengen
http://gnome-look.org/content/show.php/Screenlist+Script?content=141148
http://www.imagemagick.org/Usage/montage/
http://zenway.ru/page/movie-thumbnailer
http://zenway.ru/page/gframecatcher
http://moviethumbnail.sourceforge.net/
ffmpegthumbnailer
Generate Video Thumbnails Faster with ‘FFmpegthumbnailer’ in Cinnamon
http://blog.2ndquadrant.com/jsonb-type-performance-postgresql-9-4/
https://www.postgrespro.ru/doc/datatype-json.html
https://habrahabr.ru/post/254425/
https://www.periscopedata.com/blog/the-lazy-analysts-guide-to-postgres-json.html
https://www.postgrespro.ru/doc/functions-json.html
http://stormatics.com/howto-use-json-functionality-in-postgresql/