In stepping through a DVD movie frame by frame, I noticed there were 24 frames in a second. I always thought part of "DVD authoring" was converting that to television frame rate (30). Is that not so? Messages mention both a frame rate of 29.97 fps and "24000/1001fps progressive NTSC content." What does that mean? Does Mplayer convert the frame rate at all? Does it take into account in any way the actual refresh rate of the monitor? I'm using ffmpeg and xvidix.