util/frame: add setters for Video::height and Video::width

src/util/frame/mod.rs

@@ -251,12 +251,24 @@ impl Video {
 		}
 	}
 
+	pub fn set_width(&mut self, value: usize) {
+		unsafe {
+			(*self.0.ptr).width = value as c_int;
+		}
+	}
+
 	pub fn height(&self) -> usize {
 		unsafe {
 			(*self.0.ptr).height as usize
 		}
 	}
 
+	pub fn set_height(&mut self, value: usize) {
+		unsafe {
+			(*self.0.ptr).height = value as c_int;
+		}
+	}
+
 	pub fn color_space(&self) -> ColorSpace {
 		unsafe {
 			ColorSpace::from(av_frame_get_colorspace(self.0.ptr))