rygel & LG Smartshare: does not transcode ogg vorbis

[Frederik Himpe <fhimpe telenet be>]

I'm using Debian Wheezy and Rygel 0.20.1 and I'm sharing a directory 
containing ogg vorbis files with rygel's MediaExport plug-in. My LG smart 
tv sees these files, but refuses to play them because the file format is 
not supported.

The rygel output looks like this:

Rygel-Message: rygel-main.vala:87: Rygel v0.20.1 starting…
Rygel-Message: New plugin 'MediaExport' available
Rygel-Message: New plugin 'Playbin' available
MediaExport-Message: 'file:///mnt/storage/Music' harvested

(rygel:11174): Rygel-WARNING **: Failed to search in '0': SQLite error 1: 
no such column: m.class



My ~/.config/rygel.conf looks like this:

[general]
upnp-enabled=true
enable-transcoding=true
enable-mp3-transcoder=true
enable-lpcm-transcoder=true
enable-mp2ts-transcoder=true
enable-wmv-transcoder=true
enable-aac-transcoder=true
enable-avc-transcoder=true
video-upload-folder= VIDEOS@
music-upload-folder= MUSIC@
picture-upload-folder= PICTURES@
interface=
port=0
log-level=*:4
allow-upload=true
allow-deletion=true
[Tracker]
enabled=true
share-pictures=true
share-videos=true
share-music=true
strict-sharing=false
title= REALNAME@'s media
[MediaExport]
enabled=true
title= REALNAME@'s media
uris=/mnt/storage/Music;
extract-metadata=true
monitor-changes=true
[Playbin]
enabled=true
title=Audio/Video playback on @HOSTNAME@
[ZDFMediathek]
enabled=false
rss=508
update-interval=1800
video-format=wmv
[GstLaunch]
enabled=false
launch-items=audiotestsrc;videotestsrc;videotestoverlay
audiotestsrc-title=Audiotestsrc
audiotestsrc-mime=audio/x-wav
audiotestsrc-launch=audiotestsrc ! wavenc
videotestsrc-title=Videotestsrc
videotestsrc-mime=video/mpeg
videotestsrc-launch=videotestsrc ! ffenc_mpeg2video ! mpegtsmux
videotestoverlay-title=Videotestsrc with timeoverlay 2
videotestoverlay-mime=video/mpeg
videotestoverlay-launch=videotestsrc ! timeoverlay ! ffenc_mpeg2video ! 
mpegtsmux
[Test]
enabled=false
[MPRIS]
enabled=false
[External]
enabled=false

Any idea why the files are not transcoded to a format supported by my tv? 
Is there a way to debug what's going wrong?
-- 
Frederik Himpe