I was trying to edit a video just under 1:15 on my mid-2012 13" Macbook Pro( 2.5 GHZ Intel Core i5, 4 GB 1600 MHz DDR3, Intel HD Graphics 4000 1536 MB, El Capitan 10.11.6), but when I try to export at Pro Res (typically the fastest codec to export), it says it will take 3 1/2 hours, and after 20 minutes, it said : 3:20. Any other codec just makes the computer crash. The audio is at the default rate, and I've had no problem exporting this clip before, as well as many other projects, one of which was at H.264 at 35 mbps, and was just under 1 hour.
Thank you so much,
Behind The Lens