I need to keep the aspect ration @ 1:1
I want to crop the render
If I cannot use aspect ration to adjust the camera perspective (as this blows the resolution)
and I cannot use border/crop to capture my scene
How can I select the required part of my scene to render?
Blender 2.78
You could add a Transform strip and use the scale and position to adjust the crop. This is effectively zooming, so it may affect the image quality unless you adjust the render resolution to compensate.
I can’t zoom. I am at the top/bottom of the camera.
Scale non-uniformly, in x axis only.