During my lecture I often record my screen for student to reswatch at home. However, due to some complex connection between my laptop and school pc for projector, the video I obtain only have 480p video in the middle and around is a black cover.
Can you help me how to edit the video, i.e. removing all black and keep the 480p video inside only.
If there is any similar post, I hope you can help me direct to it, since I dont know what is the key word to search for this issue
Thank you a lot
P/S: Pls dont ask me to adjust record size of screen recorder - I tried. But not successful, and besides there were many other similar cases happens hence I would prefer to be able to remove all the dark around the video.