Here’s a method using MS Excel and PowerPoint.
In Excel, open a new workbook:
1) 1st cell, A1, enter:
0:00:00
2) Next cell down (A2), enter this formula:
=A1+”0:00:01″
3) copy/paste formula in A2 down a column, each cell represents 1 second.
This creates a 1-second incrementing time list. Changing the first cell (A1) changes the starting time.
Save workbook as a text file (MSDOS). For this example, call it “time.txt” .
In PowerPoint:
4) Select new blank presentation
5) “Insert -> Slides from Files…”
Select “time.txt” file. This creates a slide for every time item.
6) Select all slides and use “Format” to change font, size, colors. Don’t think it’s possible to use an alpha channel as a transparent background. Red letters on black background are a good start.
7) “File->Save As…” select jpg, gif, png, bmp, etc.
Select “Yes” upon prompt to save every slide in the selected folder.
A set of image files are created, sized 720×540 pixels.
8) Using your editor, import the set of image files to a timeline. If you configure the default picture import duration as 1 second you’ll have an accurate clock counter.
Somewhat tedious but it works…
–r.e.