First up, thanks for creating this project! There is a dearth of open source video editors and afaik this is the first one 🥳

This issue is about enhancing the UI for video cropping. Currently, the app requires us to manually input the output height and width which is tedious because we don't know that most of the time:

Instead, would be great if we can have something like what Simple Gallery's proprietary video editor does. Basically, allow the user to draw the rectangle over the video and take height and width from it. We can have both manual input and this rectangle UI if need be.
https://github.com/devhyper/open-video-editor/assets/8820038/e59d271c-e239-46cf-852f-a43934a56aef

As mentioned before, Simple Gallery's video editor is proprietary, although they publish it on GitHub (link). But it's an excellent tool for the job and quite intuitive to use. As a first step, maybe the goal can be to at least cover the features here and take cues from the UI.