I just started using CloneDVD mobile, version 188.8.131.52, and I'm creating a generic mp4 file. I've chosen the resolution 720x480 (NTSC TV) which should produce a frame rate of 30 fps, but the output file is only 23 fps, and the video is choppy. I don't see any other place to change the frame rate. If it matters, I'm running Windows 10 Pro 64-bit. What am I missing?