I’ve been looking for something like this for creating surveys using drone footage - extract every “n” frames from the video, then stitch ‘em up somehow to make

I’ve been looking for something like this for creating surveys using drone footage - extract every “n” frames from the video, then stitch ‘em up somehow to make a “layer”. There’s existing software for this kind of work, but I’ve been in the mood to reinvent the wheel a bit for some strange reason.