On Mon, 14 Aug 2006 10:32:13 +0800 "howard chen" <howachen at gmail.com> wrote: > Is that mean I only need to check the fps of wmv files for the "ofps" > option, Yes. > for other file, e.g. mov or 3gp, I can use a fixed "ofps" For every other file, you don't need an -ofps value.