If you want to extract audio tracks (.mp3) from a video, please see the manual below:
1. Download Bandicut from the official website (https://www.bandicam.com/bandicut-video-cutter/download/).
2. Start Bandicut and click the 'Cut' button.
3. Select the video, and click the 'Open' button.
4. Set the beginning and end points of the portion you want to save, and click on the 'Start' button.
5. Check the "Extract audio tracks (.mp3)" option and click the 'Start' button.
6. Click the 'Open' button to check the extracted .mp3 files.
If there are more than 2 audio streams, the "Save Tracks" menu will be shown.
To extract only a specific audio track, select the "Save only selected video and audio tracks" option and check "Extract audio tracks(.mp3)."