im.convert(files, output = "animation.gif", convert = c("convert",
"gm convert"), cmd.fun = system, extra.opts = "", clean = FALSE)
gm.convert(..., convert = "gm convert")im.convert: The path of the output if the command was successfully
executed; otherwise a failure message.If ani.options('autobrowse') == TRUE, this function will
also try to open the output automatically.
im.convert: the function im.convert simply wraps the arguments of the
gm.convert: the function gm.convert is a wrapper for the command