Aspect Ratio Crop
Calculate letterbox dimensions and precise cropping values.
Target Resolution
x
Crop (Top & Bottom)
px
Letterboxing vs Cropping
When watching a 2.35:1 movie on a standard 16:9 (1.77:1) monitor, you see black bars. If you are encoding a video file, you should crop these black bars out entirely to save bitrate.
ffmpeg command to crop dynamically:
ffmpeg -i input.mp4 -vf "crop=in_w:in_h-2*crop_value" output.mp4