You will need
  • program VirtualDub.
Download a computer program VirtualDub and install the operating system. Can find on the website or Try to install the software in the local disk where the operating system of the personal computer. Open the program using the shortcut on the desktop. The VirtualDub program window will be blank because you will need to add a video file for editing.
Open the movie, the audio track which you want to recode. To do this, click Open video file the File menu. In the dialog box, locate the directory where the video file. We recommend you to make a copy of the file before making changes to the original. For sound editing of the video file, click on the menu Audio and select Conversion. Make the required settings: sample rate, Precision, Channels. If you only need to handle the codec path, do not change the values.
Specify the type of compression in the Audio menu, Compression. In the window that appears, select the audio format — for example, the usual mp3 with the default settings 128kbit\s, 44100, Stereo. Please note that the values of the Windows Conversion and Compression coincide. Select the check box under the Options menu next to Sync to Audio to the video and audio components of the film were in sync. Then go to the File menu and click on Save as AVI. Write the name of the processed copy of the film and start the encoding process by clicking the Save button. As a rule, you need to create a copy of the file, and edit it to the original movie file remains unchanged. With this you can compare the quality of both movies.