mckelvey

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

mckelvey

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

mckelvey

Convert sequence of GoPro Hero 6 Black JPEG images to MKV / MP4 video

ffmpeg \
  -r 30000/1001 \
  -pattern_type glob -i '*.JPG' \
  -vf "crop=in_w:in_w*9/16,scale=3840:-2" \
  -sws_flags lanczos \
  -pix_fmt yuv420p \
 -vcodec libx264 \

mckelvey

wget --recursive --no-clobber --page-requisites --adjust-extension --span-hosts --convert-links --no-parent --no-check-certificate -erobots=off --domains yoursite.com yoursite.com/whatever/path