I'm using Mac OS 10.13.3. I have Quicktime 10.4 installed if that will help here. I recorded an application on my computer, however I recorded a little too much screen real estate. I would like to remove, or barring that, black out, the right-most 30 pixels from my movie. How can I do that on Mac using freeware tools?


There is a free video conversion tool available on Mac, Windows and Linux called Handbrake. Handbrake does a lot of things, one of which is crop a video.

If you open a video and go to the picture tab you will get something that looks like this.

Handbrake. Picture Tab

At top right you have Cropping. Select custom and then adjust the number of pixels on each edge you want removed.

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