[gstreamer-bugs] [Bug 607105] New: faac doesn't negotiate channel positions correctly

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=607105
  GStreamer | gst-plugins-bad | git

           Summary: faac doesn't negotiate channel positions correctly
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: msmith at xiph.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


faac accepts multichannel audio in any order, and just feeds into the actual
faac encoder as-is, without specifying any channel ordering.

Presumably, faac requires the channels in a particular order (probably the
AAC/MPEG order, which is e.g. C, L, R, LS, RS, LFE for 5.1). So the element
should require this in getcaps.

As it is, e.g. gst-launch filesrc location=5.1-sample.wav ! wavparse !
audioconvert ! faac ! qtmux ! filesink will output something with the channels
in the wrong order (because the wav channel ordering is different from the AAC
one).

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