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R128GAIN: An EBU R128 compliant loudness scanner
pbelkner
post Jan 5 2011, 19:38
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I've just uploaded on sourceforge a first version of r128gain, an EBU R128 (http://tech.ebu.ch/loudness) compliant loudness scanner:
http://sourceforge.net/projects/r128gain/files/
  • process single files (tracks):
    • In order to just scan and analyze one file (WAV, FLAC or WV):
      CODE
      r128gain <file>
    • In order to scan, analyze and tag one file (currently only FLAC, result will be in <directory>):
      CODE
      r128gain <file> <directory>
    • In order to scan, analyze one file (WAV, WV) and encode and tag into FLAC (result will be in <directory>):
      CODE
      r128gain <file> <directory> flac
  • recursively process directories (the content of a directory is considered an album):
    • In order to just recursively scan and analyze a directory:
      CODE
      r128gain <directory>
    • In order to recursively scan, analyze and tag a directory:
      CODE
      r128gain <directory> <directory>
      r128gain <directory>/* <directory>
    • In order to recursively scan, analyze a directory and encode and tag into FLAC:
      CODE
      r128gain <directory> <directory> flac
      r128gain <directory>/* <directory> flac
Tagging is currently supported only for FLAC:
  • REPLAYGAIN_REFERENCE_LOUDNESS: always -23 LUFS (corresponding to EBU R128)
  • REPLAYGAIN_TRACK_GAIN: loudness difference to -23 LUFS in LU measured for this track
  • REPLAYGAIN_TRACK_PEAK: true peak measured at 192 kHz for this track
  • REPLAYGAIN_ALBUM_GAIN: loudness difference to -23 LUFS in LU measured for the whole album
  • REPLAYGAIN_ALBUM_PEAK: true peak measured at 192 kHz for the whole album
These tags should be honored by each Replay Gain compliant media player.
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pbelkner
post Jan 6 2011, 09:19
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QUOTE (Fandango @ Jan 6 2011, 02:53) *
On a completely other note... What about patents?

I'm no lawyer, but the least I can say is the following: At the time of this writing the implementation of R128GAIN is exclusively based on information publicly available from the following documents:
  1. ITU-R BS.1770 ‘Algorithms to measure audio programme loudness and true-peak audio level’
  2. EBU Technical Recommendation R 128: Loudness normalisation and permitted maximum level of audio signals
  3. EBU Tech Doc 3341: ‘Loudness Metering ‘EBU Mode’ metering to supplement loudness normalisation in accordance with EBU R 128’
  4. EBU Tech Doc 3342 ‘Loudness Range: A descriptor to supplement loudness normalisation in accordance with EBU R 128’
None of them contain any reference to a patent, especially not in their list of references.

QUOTE (mudlord @ Jan 6 2011, 04:42) *
What is the license for the tool?

QUOTE (Fandango @ Jan 6 2011, 02:53) *
Is it safe to use your tool in other projects?

It's GPLv3 (http://www.gnu.org/licenses/gpl.html)
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mudlord
post Jan 6 2011, 13:20
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QUOTE (pbelkner @ Jan 6 2011, 02:19) *



Any reason why? To suit "Free" software uses only? Doing so restricts other players like FB2K from using that code, even if a different implementation is made....>_>
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pbelkner
post Jan 6 2011, 15:26
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QUOTE (mudlord @ Jan 6 2011, 14:20) *
QUOTE (pbelkner @ Jan 6 2011, 02:19) *



Any reason why? To suit "Free" software uses only?

R128GAIN is heavily based on SoX (uses SoX IO, re-sampler, filters, chain architecture etc.)

IO will probably be re-implemented in order to support most of the existing codecs using FFmpeg.

Both, SoX and FFmpeg, are GPLed, hence R128GAIN is "GPL infected".

QUOTE (mudlord @ Jan 6 2011, 14:20) *
Doing so restricts other players like FB2K from using that code, even if a different implementation is made....>_>

Yep.
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Soap
post Jan 6 2011, 15:53
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QUOTE (pbelkner @ Jan 6 2011, 09:26) *
Both, SoX and FFmpeg, are GPLed, hence R128GAIN is "GPL infected".

ffmepg is v2.1 or later. Is there a reason you went to v3?


--------------------
Creature of habit.
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cpchan
post Jan 6 2011, 16:09
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QUOTE (Soap @ Jan 6 2011, 10:53) *
ffmepg is v2.1 or later. Is there a reason you went to v3?


Not totally true, there are some code that is under GPL v3 (or later). However, I believe, they will only be enabled if you run configure with " --enable-version3".


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Posts in this topic
- pbelkner   R128GAIN: An EBU R128 compliant loudness scanner   Jan 5 2011, 19:38
- - googlebot   Didn't try the tool, yet, but had a look at th...   Jan 5 2011, 20:13
|- - pbelkner   QUOTE (googlebot @ Jan 5 2011, 21:13) Did...   Jan 5 2011, 21:32
- - C.R.Helmrich   Wow, thank you so much for this tool! I was al...   Jan 5 2011, 23:23
|- - pbelkner   QUOTE (C.R.Helmrich @ Jan 6 2011, 00:23) ...   Jan 6 2011, 00:46
|- - C.R.Helmrich   QUOTE (pbelkner @ Jan 6 2011, 01:46) It i...   Jan 6 2011, 15:23
|- - pbelkner   QUOTE (C.R.Helmrich @ Jan 6 2011, 16:23) ...   Jan 6 2011, 16:03
|- - googlebot   QUOTE (pbelkner @ Jan 6 2011, 16:03) What...   Jan 7 2011, 21:34
|- - pbelkner   QUOTE (googlebot @ Jan 7 2011, 22:34) I a...   Jan 7 2011, 22:17
|- - googlebot   QUOTE (pbelkner @ Jan 7 2011, 22:17) It s...   Jan 7 2011, 22:35
|- - pbelkner   QUOTE (googlebot @ Jan 7 2011, 23:35) PS ...   Jan 7 2011, 23:21
|- - C.R.Helmrich   QUOTE (pbelkner @ Jan 8 2011, 00:21) Many...   Jan 8 2011, 14:29
|- - pbelkner   QUOTE (C.R.Helmrich @ Jan 8 2011, 15:29) ...   Jan 10 2011, 17:38
|- - pbelkner   QUOTE (pbelkner @ Jan 10 2011, 18:38) The...   Jan 10 2011, 18:01
|- - C.R.Helmrich   Exactly, and if you pull out the "/n" in...   Jan 10 2011, 18:20
- - Fandango   On a completely other note... What about patents? ...   Jan 6 2011, 01:53
|- - mudlord   QUOTE (Fandango @ Jan 5 2011, 18:53) On a...   Jan 6 2011, 13:22
|- - cpchan   QUOTE (mudlord @ Jan 6 2011, 08:22) The o...   Jan 6 2011, 13:44
|- - mudlord   QUOTE (cpchan @ Jan 6 2011, 07:44) QUOTE ...   Jan 6 2011, 13:46
- - Notat   Congratulations on this! I know that BS.1770 ...   Jan 6 2011, 02:37
- - mudlord   What is the license for the tool?   Jan 6 2011, 03:42
- - A_Man_Eating_Duck   i can't for the life of me get this app to jus...   Jan 6 2011, 08:14
|- - pbelkner   QUOTE (A_Man_Eating_Duck @ Jan 6 2011, 09...   Jan 6 2011, 09:34
- - pbelkner   QUOTE (Fandango @ Jan 6 2011, 02:53) On a...   Jan 6 2011, 09:19
|- - mudlord   QUOTE (pbelkner @ Jan 6 2011, 02:19) It...   Jan 6 2011, 13:20
|- - pbelkner   QUOTE (mudlord @ Jan 6 2011, 14:20) QUOTE...   Jan 6 2011, 15:26
|- - Soap   QUOTE (pbelkner @ Jan 6 2011, 09:26) Both...   Jan 6 2011, 15:53
|- - cpchan   QUOTE (Soap @ Jan 6 2011, 10:53) ffmepg i...   Jan 6 2011, 16:09
|- - pbelkner   QUOTE (Soap @ Jan 6 2011, 16:53) QUOTE (p...   Jan 6 2011, 16:13
|- - Soap   QUOTE (pbelkner @ Jan 6 2011, 10:13) QUOT...   Jan 6 2011, 16:21
|- - pbelkner   QUOTE (Soap @ Jan 6 2011, 17:21) QUOTE (p...   Jan 6 2011, 16:49
|- - saratoga   QUOTE (pbelkner @ Jan 6 2011, 10:49) QUOT...   Jan 6 2011, 18:37
|- - cpchan   QUOTE (saratoga @ Jan 6 2011, 13:37) That...   Jan 7 2011, 01:39
- - Zao   Note that "use" in mudlord's post is...   Jan 6 2011, 13:29
|- - cpchan   QUOTE (Zao @ Jan 6 2011, 08:29) If you ev...   Jan 6 2011, 13:48
|- - Zao   QUOTE (cpchan @ Jan 6 2011, 13:48) QUOTE ...   Jan 6 2011, 13:52
|- - cpchan   QUOTE (Zao @ Jan 6 2011, 08:52) If more k...   Jan 6 2011, 13:59
- - Zao   Even if the end artifact is a program, this preven...   Jan 6 2011, 13:47
|- - cpchan   QUOTE (Zao @ Jan 6 2011, 08:47) Even if t...   Jan 6 2011, 13:52
|- - Zao   QUOTE (cpchan @ Jan 6 2011, 13:52) What i...   Jan 6 2011, 13:54
- - Zao   If a developer uses a library with one of the usua...   Jan 6 2011, 14:02
|- - cpchan   QUOTE (Zao @ Jan 6 2011, 09:02) If a deve...   Jan 6 2011, 14:14
- - lvqcl   Please remember that QUOTE (pbelkner @ Jan 6 ...   Jan 6 2011, 14:10
- - Zao   You cannot always dynamically link to a library, a...   Jan 6 2011, 14:16
|- - cpchan   QUOTE (Zao @ Jan 6 2011, 09:16) You canno...   Jan 6 2011, 14:33
|- - mudlord   QUOTE (cpchan @ Jan 6 2011, 08:33) QUOTE ...   Jan 7 2011, 07:19
|- - googlebot   QUOTE (mudlord @ Jan 7 2011, 07:19)To avo...   Jan 7 2011, 10:46
|- - 2Bdecided   QUOTE (googlebot @ Jan 7 2011, 09:46) No ...   Jan 7 2011, 17:45
- - GHammer   Seven of 38 posts on software licensing. Geesh...   Jan 7 2011, 04:39
|- - mudlord   QUOTE (GHammer @ Jan 6 2011, 21:39) Seven...   Jan 7 2011, 07:14
- - romor   Bad talk. You are free to see his posts if you wan...   Jan 7 2011, 15:57
|- - Soap   forget it.   Jan 7 2011, 16:43
|- - staale   Hi, Just wanted to add that we've released ou...   Jan 7 2011, 17:08
- - googlebot   Forget this, too. Else the joke doesn't work o...   Jan 7 2011, 17:02
- - jangk   Hello, back to audio issues again. Thank you pbel...   Jan 7 2011, 17:27
|- - pbelkner   QUOTE (jangk @ Jan 7 2011, 18:27) Am I mi...   Jan 7 2011, 18:13
|- - jangk   QUOTE (pbelkner @ Jan 7 2011, 18:13) QUOT...   Jan 7 2011, 19:13
|- - pbelkner   QUOTE (jangk @ Jan 7 2011, 20:13) Anyhow,...   Jan 7 2011, 19:56
- - mudlord   QUOTE How about you program your own lib or shut u...   Jan 7 2011, 18:57
- - jdoering   Please pardon the noob here; hopefully I'm kee...   Jan 8 2011, 00:28
|- - googlebot   Completely agree! One doesn't really have ...   Jan 8 2011, 01:51
|- - pbelkner   QUOTE (jdoering @ Jan 8 2011, 01:28) But ...   Jan 8 2011, 09:32
- - Notat   I have it on good authority that the calculation c...   Jan 8 2011, 18:42
- - googlebot   A fully standard compliant single-pass outline is ...   Jan 8 2011, 19:40
- - pbelkner   v0.3 released I've just uploaded the new vers...   Jan 9 2011, 18:47
|- - googlebot   QUOTE (pbelkner @ Jan 9 2011, 18:47) CODE...   Jan 12 2011, 20:26
|- - pbelkner   QUOTE (googlebot @ Jan 12 2011, 21:26) QU...   Jan 13 2011, 10:26
- - googlebot   Works perfectly, great job! Even for multichan...   Jan 10 2011, 09:58
- - googlebot   Just out of curiosity, where does that 0.4 come fr...   Jan 10 2011, 18:35
|- - jdoering   QUOTE (googlebot @ Jan 10 2011, 09:35) Ju...   Jan 10 2011, 19:27
- - googlebot   Duh. My bad!   Jan 10 2011, 21:40
- - Fandango   I have a proposal. New standard tag fields: EBU_...   Jan 11 2011, 23:14
|- - Notat   QUOTE (Fandango @ Jan 11 2011, 15:14) Wit...   Jan 12 2011, 04:11
|- - Fandango   QUOTE (Notat @ Jan 12 2011, 04:11) QUOTE ...   Jan 13 2011, 16:21
|- - pbelkner   QUOTE (Fandango @ Jan 13 2011, 17:21) But...   Jan 13 2011, 17:01
||- - 2Bdecided   QUOTE (pbelkner @ Jan 13 2011, 16:01) EBU...   Jan 13 2011, 17:24
|- - 2Bdecided   QUOTE (Fandango @ Jan 13 2011, 15:21) Mos...   Jan 13 2011, 17:20
- - Fandango   PS: I'd say that using GAIN in your prefix is ...   Jan 12 2011, 02:02
- - jdoering   I had been hoping that the written tags were being...   Jan 12 2011, 06:40
|- - pbelkner   QUOTE (jdoering @ Jan 12 2011, 07:40) I h...   Jan 12 2011, 10:21
|- - jdoering   QUOTE (pbelkner @ Jan 12 2011, 01:21) QUO...   Jan 12 2011, 21:24
|- - pbelkner   QUOTE (jdoering @ Jan 12 2011, 22:24) I t...   Jan 13 2011, 11:01
- - jdoering   Just compared r128gain output versus ReplayGain fo...   Jan 12 2011, 10:18
- - googlebot   I think you both have a valid point. I also think...   Jan 12 2011, 12:58
|- - pbelkner   QUOTE (googlebot @ Jan 12 2011, 13:58) =...   Jan 12 2011, 13:14
||- - C.R.Helmrich   QUOTE (pbelkner @ Jan 12 2011, 14:14) QUO...   Jan 12 2011, 18:27
|||- - Notat   QUOTE (C.R.Helmrich @ Jan 12 2011, 10:27)...   Jan 13 2011, 02:57
|||- - jdoering   QUOTE (Notat @ Jan 12 2011, 17:57) QUOTE ...   Jan 13 2011, 06:21
|||- - C.R.Helmrich   QUOTE (jdoering @ Jan 13 2011, 07:21) I...   Jan 13 2011, 10:25
|||- - pbelkner   QUOTE (C.R.Helmrich @ Jan 13 2011, 11:25)...   Jan 13 2011, 10:37
||- - 2Bdecided   QUOTE (pbelkner @ Jan 12 2011, 12:14) QUO...   Jan 13 2011, 11:23
||- - Notat   QUOTE (2Bdecided @ Jan 13 2011, 03:23) Yo...   Jan 13 2011, 15:41
|- - pbelkner   QUOTE (googlebot @ Jan 12 2011, 13:58) PS...   Jan 12 2011, 17:07
- - googlebot   How large are the expected differences? Is there a...   Jan 12 2011, 18:46
- - C.R.Helmrich   True. I guess for the averaging we should leave ou...   Jan 12 2011, 19:00
- - Raiden   What is so special about pink noise? How does pink...   Jan 13 2011, 11:44
- - googlebot   Pink noise has equal energy over all octaves. It...   Jan 13 2011, 12:02
- - jangk   Thank you Notat for the link to AES "Loudness...   Jan 13 2011, 13:57
- - benski   I'm with David. I think we should verify the ...   Jan 13 2011, 17:27
- - Fandango   So if the old tags are used, how do I know whether...   Jan 13 2011, 18:22
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