type f -name '*.mp4' -exec bash -c 'FILE='$1' ffmpeg -i '$.shrink.mp4 – Finally, create a new file (or overwrite existing) that has the extension. Here is the best video editing software for Mac. The command we used was the following: find. The Mac is a brilliant computer for editing video and there are lots of great apps that allow you to do just that. We did that both to save space on the internal memory of the device and to make the device perform as efficient as possible as it would not have to shrink the video on the fly. We needed to shrink a bunch of mp4 videos so that they would have the same size as the screen of an android device. VideoDuke as the best app to download Reddit video on Mac. 27 April 2016 in Bash / GNU/Linux tagged bash / ffmpeg / mp4 / resize by Tux This video tutorial also shows you how to convert the downloaded Reddit videos to.