id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
210,24bit flac encoding,Atrocia,,"I have 48 KHz / 24 bit audio files created by the Zoom H1 audio recorder; e.g.:

$ mediainfo sample.WAV 
General
Complete name                    : sample.WAV
Format                           : Wave
File size                        : 2.75 MiB
Duration                         : 10s 0ms
Overall bit rate                 : 2 304 Kbps

Audio
ID                               : 0
Format                           : PCM
Format settings, Endianness      : Little
Codec ID                         : 1
Codec ID/Hint                    : Microsoft
Duration                         : 10s 0ms
Bit rate                         : 2 304 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Bit depth                        : 24 bits
Stream size                      : 2.75 MiB (100%)

When I convert them to flac format, they become 16 bit:

$ ffmpeg -i sample.WAV sample.flac

...


$ mediainfo sample.flac 
General
Complete name                    : sample.flac
Format                           : FLAC
Format/Info                      : Free Lossless Audio Codec
File size                        : 695 KiB
Duration                         : 10s 0ms
Overall bit rate                 : 569 Kbps
Writing application              : Lavf53.0.3

Audio
Format                           : FLAC
Format/Info                      : Free Lossless Audio Codec
Duration                         : 10s 0ms
Bit rate mode                    : Variable
Bit rate                         : 563 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Bit depth                        : 16 bits
Stream size                      : 687 KiB (99%)
Writing library                  : Lavf53.0.3

ffmpeg (git-N-29954-gfc19379) throws this warning - I don't know if it's relevant:

Incompatible sample format 's32' for codec 'flac', auto-selecting format 's16'

The 'flac' tool, from the flac project, handles these files correctly:

$ flac sample.WAV

...

$ mediainfo sample.flac 
General
Complete name                    : sample.flac
Format                           : FLAC
Format/Info                      : Free Lossless Audio Codec
File size                        : 1.59 MiB
Duration                         : 10s 0ms
Overall bit rate                 : 1 336 Kbps

Audio
Format                           : FLAC
Format/Info                      : Free Lossless Audio Codec
Duration                         : 10s 0ms
Bit rate mode                    : Variable
Bit rate                         : 1 329 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Bit depth                        : 24 bits
Stream size                      : 1.58 MiB (100%)
Writing library                  : libFLAC 1.2.1 (UTC 2007-09-17)

flac gives this warning - no idea if this is related to the one ffmpeg gives:

sample.WAV: WARNING: legacy WAVE file has format type 1 but bits-per-sample=24

",enhancement,closed,wish,avcodec,git-master,fixed,flac,holunder2,,,1,0