Zhou Jin video format converter Step 1, drag the video file to the dotted box or click Add File to add the video in a new window. Step 2: Click Select Format at the setting in the lower right corner, and set the quality after selecting MP3 format as the audio format in the pop-up interface. Step 3: Click Customize to open the folder and set the storage path in the pop-up window. Step 4, click the Start Conversion button. When the conversion progress is 1%, move the mouse to open the converted file properties, and you can see that the audio file in the video has been extracted.