guliverkli

At present, images are saved with a filename of the format
"snapshotyyyymmddhhmmss". I would dearly like to be able to alter this
template, so that I can customise the default name. Primarily, I want the
image filename to be the clip name (minus extension) followed by a
hyphen-minus and then a disambiguation number. For example, this could be
"%F-%N". For a clip "foo.wmv", the default name would be "foo-1.bmp". The
next one will become "foo-2.bmp" and so on.

Otherwise, I have a horrible lot of renaming to do ...