Bug 98139

Is this with ogg vorbis files? Does it also happen for mp3?

It happens with mp3 files, I haven't tested with OGG.

Minor update: I'm using the 1.1 CVS version 2005-01-28 on GNU Linux.

I suppose you mean 1.2-CVS?

Err... yeah.
But I don't know why it was packed as 1.1CVS after mxcl's post on the ArchLinux Forums [1] (I'm using ArchLinux). I'll notify the maintainer.

[1] http://bbs.archlinux.org/viewtopic.php?t=9520

same here, changing songs always has a gap with gstreamer, also with crossfading disabled. using the same gstreamer, gst-plugins version.

Make sure you don't have gst-ffmpeg installed, I hear that does weird things.

yes, gst-ffmpeg is the bad guy

Alright, closing this report, and adding an entry to our FAQ.

I do not have gst-ffmpeg installed:
   dpkg -l | grep -i ffmpeg
gives no results. However I do have the mad plugin installed, as suggested in the FAQ:

dpkg -l | grep -i mad   
ii  gstreamer-mad  0.6.4-5.1      MAD MPEG audio decoder plugin for GStreamer
ii  gstreamer0.8-m 0.8.7-3        MAD MPEG audio decoder plugin for GStreamer
ii  libgpgme11     1.0.2-1        GPGME - GnuPG Made Easy
ii  libgpgme6      0.3.16-2       GPGME - GnuPG Made Easy
ii  libid3tag0     0.15.1b-3      ID3 tag reading library from the MAD project
ii  libmad0        0.15.1b-1      MPEG audio decoder library
ii  libmad0-dev    0.15.1b-1      MPEG audio decoder development library

I have the following gstreamer plugins installed:
ii  gstreamer-alsa 0.6.4-5.1      ALSA plugin for GStreamer
ii  gstreamer-audi 0.6.4-5.1      AudioFile plugin for GStreamer
rc  gstreamer-flac 0.6.4-5.1      FLAC plugin for GStreamer
ii  gstreamer-gcon 0.6.4-5.1      GConf support for GStreamer
ii  gstreamer-gnom 0.6.4-5.1      Gnome VFS plugin for GStreamer
ii  gstreamer-mad  0.6.4-5.1      MAD MPEG audio decoder plugin for GStreamer
ii  gstreamer-misc 0.6.4-5.1      Collection of various GStreamer plugins
ii  gstreamer-oss  0.6.4-5.1      OSS plugin for GStreamer
ii  gstreamer-plug 0.6.4-5.1      Simple GStreamer applications
ii  gstreamer-plug 0.6.4-5.1      Various GStreamer library plugins
ii  gstreamer-plug 0.6.4-5.1      Development files for various GStreamer libr
ii  gstreamer-tool 0.6.4-1.1      Tools for use with GStreamer
ii  gstreamer-vorb 0.6.4-5.1      Vorbis plugin for GStreamer
ii  gstreamer0.8-a 0.8.7-3        ATSC A/52 audio decoder plugin for GStreamer
ii  gstreamer0.8-a 0.8.7-3        AA-lib plugin for GStreamer
ii  gstreamer0.8-a 0.8.7-3        ALSA plugin for GStreamer
ii  gstreamer0.8-a 0.8.7-3        aRtsd plugin for GStreamer
ii  gstreamer0.8-a 0.8.7-3        AudioFile plugin for GStreamer
ii  gstreamer0.8-c 0.8.7-3        Colour AsCii Art library plugin for GStreame
ii  gstreamer0.8-c 0.8.7-3        cdparanoia plugin for GStreamer
ii  gstreamer0.8-d 0.8.7-3        DV plugin for GStreamer
ii  gstreamer0.8-d 0.8.7-3        DVD plugin for GStreamer
ii  gstreamer0.8-e 0.8.7-3        Enlightened Sound Daemon plugin for GStreame
ii  gstreamer0.8-f 0.8.7-3        Festival speech synthesis plugin for GStream
ii  gstreamer0.8-f 0.8.7-3        FLAC plugin for GStreamer
ii  gstreamer0.8-g 0.8.7-3        Gnome VFS plugin for GStreamer
ii  gstreamer0.8-g 0.8.7-3        GSM plugin for GStreamer
ii  gstreamer0.8-h 0.8.7-3        colorspace conversion plugin for GStreamer b
ii  gstreamer0.8-j 0.8.7-3        JACK plugin for GStreamer
ii  gstreamer0.8-j 0.8.7-3        JPEG plugin for GStreamer
ii  gstreamer0.8-m 0.8.7-3        MAD MPEG audio decoder plugin for GStreamer
ii  gstreamer0.8-m 0.8.7-3        MikMod decoder plugin for GStreamer
ii  gstreamer0.8-m 0.8.7-3        Collection of various GStreamer plugins
ii  gstreamer0.8-m 0.8.7-3        MPEG1 and MPEG2 video decoder plugin for GSt
ii  gstreamer0.8-o 0.8.7-3        OSS plugin for GStreamer
ii  gstreamer0.8-p 0.8.7-3        Simple GStreamer applications
ii  gstreamer0.8-p 0.8.7-3        All GStreamer plugins
ii  gstreamer0.8-s 0.8.7-3        SDL videosink plugin for GStreamer
ii  gstreamer0.8-s 0.8.7-3        C64 SID decoder plugin for GStreamer
ii  gstreamer0.8-s 0.8.7-3        Speex plugin for GStreamer
ii  gstreamer0.8-s 0.8.7-3        SWF (Macromedia Flash) decoder plugin for GS
ii  gstreamer0.8-t 0.8.7-3        Theora plugin for GStreamer
ii  gstreamer0.8-t 0.8.8-1        Tools for use with GStreamer
ii  gstreamer0.8-v 0.8.7-3        Vorbis plugin for GStreamer
ii  gstreamer0.8-x 0.8.7-3        X videosink plugin for GStreamer
ii  libgstreamer-g 0.8.7-3        GConf support for GStreamer
ii  libgstreamer-p 0.8.7-3        Various GStreamer libraries and library plug
ii  libgstreamer-p 0.8.7-3        Development files for various GStreamer libr
ii  libgstreamer0. 0.6.4-1.1      Core GStreamer libraries, plugins, and utili
ii  libgstreamer0. 0.8.8-1        Core GStreamer libraries, plugins, and utili
ii  libgstreamer0. 0.8.8-1        GStreamer development libraries and headers
ii  libkdegst0.6   0.6.1-8        KDE bindings for GStreamer (shared libraries

Removed gst-ffmpeg.
- alsasink produces a tiny annoying gap, exactly when amarok outputs [CollectionDB]... (I think I've reported this before, but on IRC)
- osssink works

I noticed that the gap does not occur in all kinds of fades: When I press "stop" the fade begins without a preceeding gap, but when I change from one song to another, the gap occurs.

Using osssink is not very benefic for my system. ALSA handles the sounds everywhere, mixing them if possible (with sounds from other apps).
I've tried switching back to xine-engine BUT it didn't work.

Reinstalling gst-ffmpeg fixed xine-engine (unfortunately, xine-engine does not use alsa).
This makes me think:
1. xine-engine somehow depends on gst-ffmpeg
2. gst-ffmpeg works, but gstreamer-engine does not use it properly.

I have also noticed that gstreamer-engine + alsasink uses a lot more CPU that gstreamer-engine + osssink/xine-engine.

Crossfading in gstreamer-engine is done a lot more properly compared to crossfading in xine-engine. Using xine-engine, stopping a song does not fade out for example. (well.. this is another issue).