Bumped into a mysterious problem yesterday. iwisoft SWF to video converter acted strange. The converted video on my PC and my notebook produce completely different file sizes and play times. It worked correctly on the notebook but the movie played way beyond where the music ended.
Reminiscent of the time I was producing DVD versions. Never understood how I solved the problem then. It was tweaking some obscure software by trial and error. This is no way to operate.