On Fri, 26 Jul 2013 18:35:02 -0400
Martin Cracauer <cracauer(a)cons.org> wrote:
Thanks again. Things are looking much better now. I
embraced the
concept of not being able to predict this. Turns out I have old
screwed up things that really benefitted from revisiting them and
cleaning them up.
Marc Lavall??e wrote on Thu, Jul 25, 2013 at 04:45:48PM -0400:
Martin Cracauer <cracauer(a)cons.org> a
??crit :
Is there a way to hook up ebumeter to just an
audio file or a
stream not associated with real time? It seems to come in a jack
package only.
Thanks again
Martin
http://r128gain.sourceforge.net/
That works. Comes in the Debian ebumeter package, BTW.
But how do I translate the output to a required db or ratio
adjustment?
I have a file in front of me that was maxed out amplitude wise by
somebody else. According to lame I needed --scale 0.64 to get it not
to clip in lame (should be 3.9 db). Which, BTW was not the value it
first estimated that I would need.
ebur128 --lufs:
Integrated loudness: -4.9 LUFS
Loudness range: 5.5 LU
Integrated threshold: -13.0 LUFS
Range threshold: -25.0 LUFS
Range min: -8.6 LUFS
Range max: -3.1 LUFS
Momentary max: -1.2 LUFS
Short term max: -2.4 LUFS
I don't see that any of the value correspond with what lame needed to
not clip over a collection of different loudness clips. (means: some
clips that needed less --scale have higher numbers here and others
have lower)
I assume the ebumeter output is more for making things sound even
(between different pieces) and not directly a tool to max out
anything, is that right?
Martin
A good place to find out about this is the talk by Fons and Jörn given
at the LAC 2011, here's the link to the program page where you can find
the paper, slides and the video recording: