I have a Divx with 48Hz Stereo MP3 sound at 128 KBps. I saved the mp3 and reduced its size and changed the frequency to 64kbps and 22Hz. I tried multiplexing the video with the new MP3 but video/audio dont match. I went to Video-->Framerate and saw the "Match audio and video" option, it was at 12fps. I checked the audio and it was fine and has the same duration as the video! I put them both at Direct Stream Copy and saved, but still the audio was far behind. Can anyone tell me what iam doing wrong?