The cropping rectangle must be unambiguously specified by using any two of -top, -bottom, and -height, plus any two of -left, -right, and -width.
The cropping rectangle may fall partially or completely outside an image it is crop ping; in that case, the area outside is filled with zeros.
vcrop
-in | input image |
-out | output image |
-top | Specifies the first (top) row of the cropping rectangle. |
-bottom | Specifies the last (bottom) row of the cropping rectangle. |
-left | Specifies the first (leftmost) column of the cropping rectangle. |
-right | Specifies the last (rightmost) column of the cropping rectangle. |
-height | Specifies the height of the cropping rectangle. |
-width | Specifies the width of the cropping rectangle. |