[Bug 753275] New: Opus: playback gain always relative to EBU R128 level (-23db LUFS), must be played 5db louder to match ReplayGain level (-18db LUFS) when using ReplayGain

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Wed Aug 5 02:26:28 PDT 2015


https://bugzilla.gnome.org/show_bug.cgi?id=753275

            Bug ID: 753275
           Summary: Opus: playback gain always relative to EBU R128 level
                    (-23db LUFS), must be played 5db louder to match
                    ReplayGain level (-18db LUFS) when using ReplayGain
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: madigens at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

(not sure if this is the correct place to ask for this)

I use Clementine (GStreamer-based) and ReplayGain all my music. I noticed that
while playing around with the new Opus format, those files are played much
quieter than music in other formats. After digging around, I found: Opus files
are by design always normalized to -23db LUFS (R128), while ReplayGain defaults
to -18db LUFS. Foobar2000 seems to simply preamp these files +5db when playing.
Could GStreamer do the same? Or maybe take an argument of what reference level
to use so players can set and forget it?

(Maybe related: Bug 751534)

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