Reads input video at wrong framerate

This converter does work to convert between mov and MP4 videos, but it doesn’t seem to read the input mov at the right framerate. I have some movs which were recorded at 20FPS. QuickTime and VLC play them correctly, but when I open the files in this converter, it reports that they are much shorter than they actually are, and plays them too quickly. Thus, the output video is also played too quickly, even if I manually set the output framerate.

0x8BADF00D about Free MP4 Converter