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Bug 374737 - [matroskademux] doesn't recognise opaque "A_AAC" codec ID
[matroskademux] doesn't recognise opaque "A_AAC" codec ID
Product: GStreamer
Classification: Platform
Component: gst-plugins-good
git master
Other Linux
: Normal normal
: 0.10.5
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Reported: 2006-11-13 16:09 UTC by Bastien Nocera
Modified: 2006-11-15 11:20 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description Bastien Nocera 2006-11-13 16:09:40 UTC
Download the file from:

It's supposed to be "AAC+SBR" audio. The file shows up as having no audio at all, and an error on the command-line:
** Message: don't know how to handle audio/x-unknown
Comment 1 Tim-Philipp Müller 2006-11-14 11:24:52 UTC
Also a problem with the fluendo isodemux plugin by any chance?

Audio streams are detected fine for me with qtdemux from -bad CVS (something not entirely right with the number of channels though, but there's a bug for that already somewhere).

Comment 2 Bastien Nocera 2006-11-14 11:46:58 UTC
It's an mkv file :)
I'm using gstreamer-plugins-good-0.10.4-1.fc6
Comment 3 Tim-Philipp Müller 2006-11-14 14:05:39 UTC
Sorry, thought it was the same file as in the other bug report (I did wonder about the A_AAC bit though ;)).

Looks like AVI-Mux can produce files like this (according to This is broken according to the matroska spec as far as I can see, but what can you do *sigh*

Comment 4 Tim-Philipp Müller 2006-11-15 11:20:00 UTC
Seems to be an addition to the official spec. Fixed in CVS:

 2006-11-15  Tim-Philipp Müller  <tim at centricular dot net>

        * gst/matroska/matroska-demux.c: (gst_matroska_demux_add_stream),
          Handle opaque/unspecified A_AAC audio codec ID (fixes #374737).