David W. McKelvey 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:

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 \

	-- 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%'