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

[JJZolx]

As a casual follower of these threads, is there a difference between ITU BS.1770 and the R128GAIN algorithm discussed in the other thread? If not, what's the difference between this tool and the one offered in the R128GAIN thread?

[pbelkner]

As a casual follower of these threads, is there a difference between ITU BS.1770 and the R128GAIN algorithm discussed in the other thread? If not, what's the difference between this tool and the one offered in the R128GAIN thread?

"flac1770" is meant to be a lightweight version of "r128gain" specialized to FLAC working around some specufic FFmpeg and SoX related issues brought up in the r128gain thread:

• avoids using FFmpeg
• avoids using SoX (the SoX resampler crashes on huge files, will be fixed with the next release thanks to a SoX patch provided by MrMod)
• is based on "libFLAC"
• should preserve FLAC artwork
• uses Secret Rabbit Code for up-sampling
• has "true peak" switched off by default
• doesn't provide "loudness range" computation (if provided in the future it will be switched off by default)
• no unicode support on win32

Both, "r128gain" and "flac1770" use the ITU BS.1770 loudness algorithm as provided by "lib1770".

This post has been edited by pbelkner: Dec 8 2012, 08:23