rotate source clip

Set a rotation parameter (in 90deg steps) in one clip in a way that is applied before all other effects. Useful when the camera tagged the footage as vertical when its really horizontal and vice reversa.

Lightroom recognises this problem and offers a shortcut to change rotation.

Forums suggest a source clip transform effect. This is impractical for multiple reasons:

• Slow workflow, fiddly when wrongly rotated files are mixed clockwise and counterclockwise. On top of copy paste the deg. number has to be changed between -90 and 90.
• clips are not displayed correctly in source viewer
• not working together with other features like fit / fill frame

I think two buttons in the source viewer, representing clockwise and anticlockwise rotation would be reasonable.