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Bug 357853 - AC3 audio in AVI: voice volume is too low
AC3 audio in AVI: voice volume is too low
Status: RESOLVED DUPLICATE of bug 348002
Product: GStreamer
Classification: Platform
Component: dont know
0.10.10
Other All
: Normal normal
: NONE
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks:
 
 
Reported: 2006-09-26 17:34 UTC by Priit Laes (IRC: plaes)
Modified: 2006-09-26 19:21 UTC
See Also:
GNOME target: ---
GNOME version: 2.15/2.16

Attachments
debug-3.log (156.58 KB, text/plain)
2006-09-26 17:36 UTC, Priit Laes (IRC: plaes) 		Details

Description Priit Laes (IRC: plaes) 2006-09-26 17:34:55 UTC 
Please describe the problem:
Currently gstreamer has some issues regarding playback of AC3 audio, because volume level of some channels is too low.

Mplayer plays them fine:
Playing test.avi.
AVI file format detected.
ID_VIDEO_ID=0
ID_AUDIO_ID=1
VIDEO:  [XVID]  576x240  12bpp  25.000 fps  583.7 kbps (71.3 kbyte/s)
==========================================================================
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)
==========================================================================
ID_FILENAME=test.avi
ID_DEMUXER=avi
ID_VIDEO_FORMAT=XVID
ID_VIDEO_BITRATE=583744
ID_VIDEO_WIDTH=576
ID_VIDEO_HEIGHT=240
ID_VIDEO_FPS=25.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_CODEC=a52
ID_AUDIO_FORMAT=8192
ID_AUDIO_BITRATE=448000
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=2
ID_LENGTH=21.64
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
ID_VIDEO_CODEC=ffodivx


Steps to reproduce:
1. Try to play the test file using totem or "gst-launch-0.10 playbin uri=file://..."
2. Wait until the character starts speaking...



Actual results:
Sound volume is too low and speaking is almost unrecognizable.

Expected results:
Crystal-clear sound :)

Does this happen every time?
Yes

Other information:
I first encountered this on Ubuntu Edgy, then on Gentoo Linux (~x86)
Comment 1 Priit Laes (IRC: plaes) 2006-09-26 17:36:02 UTC 
Created attachment 73446 [details]
debug-3.log

GST_DEBUG="3" output...
Comment 2 Priit Laes (IRC: plaes) 2006-09-26 17:42:28 UTC 
Small example file:
http://plaes.org/files/2006-Q3/gstreamer-ac3-problem.avi
Comment 3 Tim-Philipp Müller 2006-09-26 19:21:36 UTC 
Works fine for me with gst-plugins-ugly CVS. I'd guess this is either a duplicate of #348002 or (less likely, but possible) a duplicate of one of the open alsa multichannel bugs.

Please re-open if you still have this problem with a52dec/gst-plugins-ugly from CVS (or 0.10.5 once it is released).


*** This bug has been marked as a duplicate of 348002 ***