The audio on a DVD is stored in the video file.
On a DVD disc, the audio that you hear play with each clip is not stored as a separate file. Instead, the audio information is contained in each individual video file. So, if you want to replace DVD audio, it's not as simple as switching out a few files. You can replace DVD audio in a video-editing application. The key is getting the DVD video clips into a format that you can edit.
Instructions
Rip and Convert the DVD Video File
1. Place the DVD on which you want to replace the audio into the DVD drive of your computer. Close the media player that comes up if one automatically begins playing the disc. Go to the "Start" menu and click "Computer." The DVD should be listed in the DVD drive.
2. Right-click the DVD drive and choose "Open" from the menu that appears. A window opens and displays the "Video_TS" and "Audio_TS" folders contained on the DVD. Copy the "Video_TS" folder to your computer's desktop by dragging the icon from the window to the desktop. Once you have copied the "Video_TS" folder, you can remove the DVD from the DVD drive.
3. Double-click the "Video-TS" folder to open it. Click on each file contained in the folder to find the longest, largest file video file. This file is almost always the main movie file on the DVD, and has a ".vob" extension. When you find the file, right-click and choose "Copy."
4. Click the button in the right corner with the horizontal line to minimize the folder. Right-click the desktop and choose "Paste" to move the individual movie file to the desktop.
5. Right-click the VOB movie file on the desktop. Select "Rename." Change the file extension from ".vob" to ".mpg." Since a VOB file contains MPEG video, this should cause no complications, and many video editors accept MPEG files, but do not accept VOBs.
Replace the Audio
6. Launch any video editor on your computer, such as iMovie or Windows Movie Maker. When the program opens, go to "File" and "Import." Go to the desktop in the window that comes up and double-click the DVD file on the desktop to open it in the editor.
7. Drag the DVD video from the "Media" pane in the editor down to the timeline in the editor. Click the "+" by the "Audio" timeline if the audio track does not display along with the video, and you should see two separate tracks, one for video and one for audio. Right-click the video file and choose "Unlink." This option is available in many editors.
8. Right-click on the audio track once the tracks are unlinked and choose "Delete." The audio track is removed from the timeline. In programs that do not allow you to unlink the video and audio tracks, right-click the audio track and choose "Mute." The track remains with the video, but you can no longer hear it.
9. Go back to the "File" menu, choose "Import" again and find the audio that you want to use to replace the DVD audio. Double-click the audio file to add it to the DVD project. Once it has been added, drag the audio clip to the audio timeline where the original clip was removed. If you could not remove the original audio, drag the clip to the second "Audio" track in the editor, and it will work the same way.
10. Publish the video footage with the new audio by going to the "File" menu in the program and clicking "Publish" or "Export" and entering a name for the project. Once the video file is saved with the replaced audio, you can burn the project back to DVD in any standard DVD-burning application.
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