I'm not really a video expert, I'm more into Geographical Information Systems (GIS). I've recently been able to make some great time-based animations of Geographical Data using the excellent QGIS with Time Manager plugin, and mencoder. The former outputs a series of static PNG files and the latter converts to a video.
I would like to improve these by adding text to the video, so that over a specific period of time (i.e. specific number of frames) some text is showing. This text should vary by month or week of the video.
I'm wondering if anyone has any good techniques for this. My first thoughts were that I would have to either:
- Alter the relevant PNGs programmatically, perhaps using a tool like Image Magick. This would require selecting the correct frames to work on somehow
- Do it in video-editing software. I don't know whether there are any that can do something like this. Ideally it would be open-source and able to run on Windows as this is a work project.
Does anyone have any experience with either of these two methods, or some general advice?