Common options
List all supported formats
-formats
Use specific format
-f <Format-Name>
Set output size
-s [SIZE-Name]
Where SIZE-Name can be one of the following.
See man page for a full list
           sqcif
               128x96
           qcif
               176x144
           cif 352x288
           4cif
               704x576
           qqvga
               160x120
           qvga
               320x240
           vga 640x480
           svga
               800x600
           xga 1024x768
           uxga
               1600x1200
           qxga
               2048x1536
           sxga
               1280x1024
See also
Convert