How does Instagram crop video in android app?

Question

I am trying to record the video in 1:1 ratio (square) and i cant get it to work, if i set custom resolution in media recorder instance i get an error on media recorder start.

Answer 1

1. You can take a look at https://github.com/boxme/SquareCamera. It's used to crop a image, but the idea can be used to crop a video. The main idea is to add a black cover top and bottom(or left and right)to make it seemed like a square.
2. FFmpeg can be used, of course, though it is a little complicated.