Convert .flac to .mp3 with ffmpeg, keeping all metadata

Question

How can I convert .flac to .mp3 with ffmpeg, keeping all metadata (that is converting Vorbis comment in .flac files to ID3v2 metadata of .mp3)?

Answer 1

I know that this was not asked, but considering that one of the reasons that this is done (at least that's what I wanted to do) is so that the music can be imported into Apple iTunes which doesn't support FLAC. In such case it makes more sense to convert FLAC to Apple's own lossless format, m4a. I used this command to convert all the files in the current folder, while retaining similar file sizes.

find . -name "*.flac" -exec ffmpeg -i {} -map_metadata 0 -acodec alac {}.m4a \;