Overview

Add video fade in (from black) and fade out (to black) transition options at the start and end of the exported clip.

Implementation

In FFmpeg video filter chain:

fade=t=in:st=0:d=1,fade=t=out:st={outStart}:d=1

Add controls in the settings panel.

Acceptance Criteria

• Video fade in duration control
• Video fade out duration control
• Synchronized with audio fades when both enabled