[ffmpeg] Retrieving and Saving media metadata using FFmpeg

I want to read the metadata in media files and then save that metadata in a text/xml file, so that I can later insert that data in my database. I would prefer to use ffmpeg.

Also is the same thing possible with MediaInfo?? I know I can get the metadata for individual tracks using MediaInfo, but I would want to automate it; as in whenever a new media file is found, read its metadata and then store it in a txt/xml file.

Or, is there any other tool/utility/API that I can use for this?