I recommend a converter for you.
(Lightning video conversion king
Version 6.3.0
Easy to use, quick to use, just fill in the registration number and password casually, and click directly to continue the trial (this is easy to use, idiot, I usually use this, the key is speed and quality).
After installing the converter, open the interface-there is an add video file on it-open the add video file to find the video file you want to convert and add it-and then you will be prompted what format you want to convert-select the post-point conversion ... You add the video, select the audio format, such as MP3 or other, and then intercept the paragraph, and then click the post-point conversion. If you want it all, don't intercept the direct integral conversion.