[libav-bugs] [Bug 491] New: AC3 encoder does not write DRC and other metadata

bugzilla-daemon at aruru.libav.org bugzilla-daemon at aruru.libav.org
Thu Apr 11 19:51:38 CEST 2013


http://bugzilla.libav.org/show_bug.cgi?id=491

           Summary: AC3 encoder does not write DRC and other metadata
           Product: Libav
           Version: git HEAD
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: libavcodec
        AssignedTo: bugzilla at libav.org
        ReportedBy: kierank at ob-encoder.com


The AC3 encoder does not calculate Dynamic Range Control and other metadata
(comprng and similar). This causes quiet output when downmixing from 5.1 on
receivers as well as non-compliance with the spec.

There's an implementation in fdk-aac but there are a lot of random numbers
there and I don't really want to port it directly since it's of course a
licence violation.

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