Hello and good day p1hill. Thank you for reaching out and for the inquiry. As of the moment it is not possible to record sound when flying your DJI Mavic Mini. To record or to add audio you need to edit the said video and add audio to the finished product. In addition I hope that you will get the best recommendation from our valued DJI co pilots on what is the best video editing software they are using. Thank you.
You are very much welcome p1hill. If you have any other inquiries or concerns with DJI. Please feel free to post it here at DJI Forum. We are here to help and support you.
It depends on how much editing you want to do like adding effects and such. There should be a few free apps out there but me personally I only use Adobe Premiere and Adobe After Effects since that is what I learned with may years ago.
Adding audio as a video enhances the video and makes it more interesting and immersive. That is why most of the videos that bloggers add to the Internet are filled with different audio tracks. I am wondering what software can be used to do this?