I use Flash CS5 at work, to make simple advertising animations. I've been using it for over a year, and it never failed. But on the last week, when I try to export a video 20 seconds long, it exports at different lengths every time that I try (sometimes 40 seconds, sometimes 70, sometimes even 200). I look at the settings and they're ok (25 fps, 500 frames, that would make 20 seconds in theory), but Flash won't export the videos to the length that I indicate.
Does anyone know why is this happening? Any ideas of how can I fix it? Thanks a lot!