FLAC1170: a ITU BS.1770 loudness scanner for FLAC Options

[pbelkner]

FLAC1770 is a ITU BS.1770 loudness scanner and tagger for FLAC. For tagging it should do exactly tha same as "metaflac".

Binaries are available for Win32, Linux, and Linux64:

• Download: https://sourceforge.net/projects/r128gain/files/flac1770/
  
• Download v0.1: https://sourceforge.net/projects/r128gain/f...s/flac1770/0.1/

CODE

$ flac1770
FLAC1170 v0.1.0, a ITU BS.1770 loudness scanner for FLAC.

Usage: flac1770 [options] <files>

Options:
  --help: dispaly this usage information and exit.
  --version: dispaly version information and exit.
  --tag: write replay gain tags to the input files (off).
  --r128: use EBU R128 compliant presets (default).
  --a85: use ATSC A/85 compliant presets.
  --rg: use ReplayGain compatible presets.
  --reference=<float>: set reference loudness (-23.0).
  --gate=<float>: set BS.1770 gate (-10.0).
  --partition=<int>: set BS.1770 partition (4).
  --unit=LU|LK|dB: use the respective loudness unit (LU).
  --progress=on|off: display progress percentage (on).
  --true-peak=fast|medium|best|off: determine inter-sample peaks (off).

Some examples:

• Analyze some individual tracks:
  CODE
  flac1770 track1.flac track2.flac track3.flac
  
  
  
• Analyze some individual tracks and write RG tags to them:
  CODE
  flac1770 --tag track1.flac track2.flac track3.flac
  
  
  
• Analyze all tracks from a folder:
  CODE
  flac1770 dir/*.flac
  
  
  
• Analyze all tracks from a folder and write RG tags to them:
  CODE
  flac1770 --tag dir/*.flac
  
  
  
• Analyze all tracks from a folder and write RG tags to them, compatible with standard ReplayGain:
  CODE
  flac1770 --rg --tag dir/*.flac
  
  
  
• Analyze all tracks from a folder, including inter-sample peak determination, and write RG tags to them, compatible with standard ReplayGain:
  CODE
  flac1770 --rg --true-peak=fast --tag dir/*.flac

This post has been edited by pbelkner: Dec 2 2012, 17:30

[eahm]

Thanks for the software.

Shouldn't the / be \?

Also, why is the ReplayGain calculated by flac1770 much different than the one calculated by foobar2000?

This post has been edited by eahm: Dec 2 2012, 17:35

[pbelkner]

Also, why is the ReplayGain calculated by flac1770 much different than the one calculated by foobar2000?

I've uploaded a corrected version 0.1.1: https://sourceforge.net/projects/r128gain/f...s/flac1770/0.1/.

Fortunately only the absolute loudness values displayed in the first column "loudness" where w.r.t the ITU world and not w.r.t. the RG world. The differences between two absolute values doesn't depend on that, and hence the calculated gains where correct.

I don't know how "foobar" calculates replay gain, i.e. whether it uses the RG algorithm or the ITU algorithm. Of course, the results of the two algorithms differ.

This post has been edited by pbelkner: Dec 2 2012, 18:39

[Surfi]

I don't know how "foobar" calculates replay gain, i.e. whether it uses the RG algorithm or the ITU algorithm. Of course, the results of the two algorithms differ.

::

from foobar2000 1.1.7 change log:
"Updated ReplayGain scanning code to the latest version of libebur128."

... so shouldn't the results be identical?


Greetings, ...

::

[pbelkner]

from foobar2000 1.1.7 change log:
"Updated ReplayGain scanning code to the latest version of libebur128."

... so shouldn't the results be identical?

flac1770 is based on lib1770 and gives exact the same results as r128gain which is also based on lib1770. Both tools implement ITU BS.1770-2: i.e. a gate of -10.0 dB and a block overlap of 75%, which is also conformant with the latest EBU R128 (2011).

I don't know what fb2k or libebur128 are doing. Please note that the preliminary 2010 version of EBU R128 required a gate of -8.0 dB and a block overlap of 50%.

[Surfi]

flac1770 is based on lib1770 and gives exact the same results as r128gain which is also based on lib1770.

::

No, it doesn't. Here's a comparison (click thumbs, please):



FLAC1770:


r128gain


::

This post has been edited by Surfi: Dec 4 2012, 11:42