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24bit FLAC shown as 32 bits per sample #23

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welpo opened this issue Jul 8, 2015 · 8 comments
Open

24bit FLAC shown as 32 bits per sample #23

welpo opened this issue Jul 8, 2015 · 8 comments

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@welpo
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welpo commented Jul 8, 2015

Tried a couple of different directories with 24 bit FLAC files inside, dr14 T.meter reports '32 bit' in the Bits per sample field.
@simon-r
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simon-r commented Jul 8, 2015

Is a problem with ffmpeg, it oversamples to 32bit and print 32bit

@welpo
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welpo commented Jul 8, 2015

Maybe it's possible to grab the bit depth in some other way to output the proper information?

@simon-r
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simon-r commented Jul 8, 2015

The information printed by ffmpeg is always 32bit.
Actually ffmpeg is installed (by default) on all linux distro, and is the most practical way the read the audio metadata.

@magicgoose
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Just tried it

ffprobe some_24_bit_file.flac

…
Stream #0:0: Audio: flac, 48000 Hz, stereo, s32 (24 bit)
…

It's possible to extract true bit depth at least for FLAC, at least with recent ffmpeg/ffprobe

@wcasanova
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I also get an error with the Bits per sample, everything shows as 32bit.
please fix.
archlinux ffmpeg 4.1

drizzt added a commit to drizzt/dr14_t.meter that referenced this issue Apr 25, 2020
@drizzt
Get the correct bit depth on FLAC (simon-r#23)
e78b6dd 
Recent ffprobe give the correct bit depth on 24 bit FLAC:
  Stream #0:0: Audio: flac, 192000 Hz, stereo, s32 (24 bit)
simon-r added a commit that referenced this issue Apr 26, 2020
@simon-r
Merge pull request #67 from drizzt/fix_21
d4c76a0 
Get the correct bit depth on 24 bits FLAC (#23)
@4oo4 4oo4 mentioned this issue Apr 12, 2022
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@fir3-1ce
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I also have this issue. Does it affect the actual DR results?

@magicgoose
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I also have this issue. Does it affect the actual DR results?

it should not, DR formula is scale-independent

@cvillela
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Same issue

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@simon-r @magicgoose @welpo @wcasanova @cvillela @fir3-1ce