How can I convert FLAC to MP3 using FFmpeg?
What I've tried:
ffmpeg -i "file.flac" "file.mp3"
Stream mapping:
Stream #0:0 -> #0:0 (flac -> ?)
Encoder (codec none) not found for output stream #0:0
file.mp3 is empty
ffmpeg -codecs | grep flac
ffmpeg version N-46093-g14f69a0 Copyright (c) 2000-2012 the FFmpeg developers
built on Oct 28 2012 15:24:03 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
configuration: --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-pic --enable-thumb --enable-libfaac --enable-gpl --enable-nonfree
libavutil 52. 1.100 / 52. 1.100
libavcodec 54. 69.100 / 54. 69.100
libavformat 54. 35.100 / 54. 35.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 20.106 / 3. 20.106
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
DEA..S flac FLAC (Free Lossless Audio Codec)
ffmpeg -codecs | grep mp3
ffmpeg version N-46093-g14f69a0 Copyright (c) 2000-2012 the FFmpeg developers
built on Oct 28 2012 15:24:03 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
configuration: --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-pic --enable-thumb --enable-libfaac --enable-gpl --enable-nonfree
libavutil 52. 1.100 / 52. 1.100
libavcodec 54. 69.100 / 54. 69.100
libavformat 54. 35.100 / 54. 35.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 20.106 / 3. 20.106
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
D.A.L. mp3 MP3 (MPEG audio layer 3) (decoders: mp3 mp3float )
D.A.L. mp3adu ADU (Application Data Unit) MP3 (MPEG audio layer 3) (decoders: mp3adu mp3adufloat )
D.A.L. mp3on4 MP3onMP4 (decoders: mp3on4 mp3on4float )
Best Answer
Your version of FFmpeg has no MP3 encoder. It can only decode, as indicated by the "D" in the command line output.
If you built it yourself, install LAME before — this depends on your distribution — and then reconfigure it
--with-libmp3lame
.Or pick a static build from the FFmpeg download page.
This should give you access to the de facto standard MP3 encoder.