How can I convert FLAC to other formats in OS X?

Question

I have a few FLAC files that I'd like to play with iTunes. I would like to retain the metadata if possible.

How can I convert the files to a format supported by iTunes?

Solution 1

You can always convert media via FFmpeg, available as a static build for OS X from the downloads page.

ffmpeg -i in.flac -c:a libmp3lame -q:a 4 -map_metadata 0 out.mp3

Set the quality via -q:a, which corresponds to LAME's VBR options, 4 being default and 0 being the best quality.

Solution 2

aac:

ffmpeg -i file.flac -acodec libfaac -aq 250 file.m4a

-aq 400 ≈ 270 kb/s for music, 200 ≈ 210 kb/s, 100 ≈ 130 kb/s.

alac:

for f in *.flac; do ffmpeg -i "$f" -acodec alac "${f%flac}m4a"; done

mp3:

ffmpeg -i file.flac -aq 0 file.mp3

-aq 0 corresponds to -V0 in lame.

ffmpeg preserves tags by default but not cover art.

Solution 3

I've used Max with success in the past.

Solution 4

I've recently used xACT, a front end to several audio manipulation and tagging programs. It can do conversion from FLAC to MP3, AAC and Opus. Here you can see the tab from which you perform the conversion:

The metadata are preserved, as you can see from the Media Information dialogs (taken in VLC) for a FLAC file and its conversion in MP3:

P.S.: the linked site uses frames, to read a comprehensive description of the program follow this link.

Solution 5

Assuming you have ffmpeg installed (brew install ffmpeg)

Go into the directory in terminal. Run:

for f in *.flac; do ff=${f%.flac}.mp3; ffmpeg -i "$f" -c:a libmp3lame -q:a 0 -map_metadata 0 "$ff"; done

This should produce a directory of mp3 as well as flac in v0 format

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Comments

[Ignacio Vazquez-Abrams]

Normally I'd say SoundConverter, but getting gstreamer running on OS X is No Fun.

[Brian Thery]

The link seems to be dead.