If no gif-file is given, GifClip will try to read a GIF file from stdin.
Quiet mode. Default off on MSDOS, on under UNIX. Controls printout
of running scan lines. Use -q- to invert.
[-i Xmin Ymin Xmax Ymax]
Clip first image to the dimensions as specified
by the 4 coordinates (Xmin Ymin Xmax Ymax) of a box clipping region.
For example: '-i 11 22 33 44' will crop the box from top left [11,22]
to bottom right [33,44] out of the first image.
If the first parameter is bigger than third one (Xmin > Xmax) they are
swapped. Same for Y.
The dimensions of the clipped image must be confined to original image
width and height. Note the clipped image includes both the min & max
boundary; an image of width W can have coordinates 0 to W-1 (zero based).
Only one of -i or -n can be specified.
[-n n Xmin Ymin Xmax Ymax]
Same as -i above but for the nth image:
`-n 1 11 22 33 44' is exactly the same as the example in -i. Only one of
-i or -n can be specified.
Complement. This removes horizontal and/or vertical bands of the
image. For example `-c -i 638 3 658 13' would remove a horizontal band
11 pixels deep beginning at raster line 3, and a vertical band 21 pixels
right beginning at pixel 658.
Print one line of command line help, similar to Usage above.
Note: all coordinates are 0-based --- the top left corner is (0, 0).