[gstreamer-bugs] [Bug 348002] New: AC3 5.1 foreground movie sound cannot be heard in Totem/gst-launch while OK in MPlayer

[GStreamer (bugzilla.gnome.org)]

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 GStreamer | gst-plugins-ugly | Ver: HEAD CVS

           Summary: AC3 5.1 foreground movie sound cannot be heard in
                    Totem/gst-launch while OK in MPlayer
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: Normal
         Component: gst-plugins-ugly
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: lubomir.marinov at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.15/2.16
   GNOME milestone: Unspecified


It's the second movie that I've come across that exhibits this problem.

I started Totem and the background music started playing but when the people
started talking there was nothing coming out of their mouths to hear (and I had
my sound volume set pretty high). I tried playing the movie through
"gst-launch-0.10 playbin uri=file:///home/lubo/foo.avi" and the results were
the same. So I ran "mplayer foo.avi" and everything (i.e. the foreground
sound/speech) came out right.

$ mplayer foo.avi
MPlayer dev-SVN-r19100-4.1.1 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Celeron(R) CPU 2.60GHz (Family: 15, Model: 2, Stepping: 9)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2


Playing /home/lubo/foo.avi.
AVI file format detected.
VIDEO:  [XVID]  576x240  24bpp  23.976 fps  963.0 kbps (117.6 kbyte/s)
Clip info:
 Software: Nandub v1.0rc2
Xlib:  extension "XFree86-VidModeExtension" missing on display "localhost:1.0".
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 5.1 (3f+2r+lfe)  48000 Hz  448.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...

I wasn't much into gstreamer and gst-launch so I went trying and randomly
combining things from the man pages.

I got the same problem with no foreground sound/speech with the following:

$ gst-launch-0.10 filesrc location="/home/lubo/foo.avi" ! avidemux ! a52dec !
audioconvert ! audioresample ! autoaudiosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: audioclock2


But when I changed the command line to the following, then the sound came out
right just like in MPlayer:

$ gst-launch-0.10 filesrc location="/home/lubo/share/movies/Pirates of the
Carribean/Pirates of the Carribean (1).avi" ! avidemux ! a52dec ! audioconvert
! audioresample ! audio/x-raw-int,rate=48000,channels=2 ! autoaudiosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: audioclock2

I suppose this means that what I'm reporting is not actually a bug in
a52dec/gst-plugins-ugly/gstreamer but I thought that because MPlayer detected
it and I couldn't tweak Totem to play it out right, it might be something that
a52dec couldn't figure out (or some part of gstreamer for that matter but I'm
not very educated in the area).

Thank you in advance for your attention.


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