IssueTracker

note that ogg is a container format, there could also be a video inside. i.e. it's
like avi and not like mp3. but this is probably easy to fix.

Is .ogg a different container format than .oga? I've noticed that renaming my .oga
files (ripped from CDs by Rhythmbox) to .ogg will allow them to be played.

Internally, .ogg and .oga sound files are identical internally.

Xiph.org manage the OGG specification and changed it some time ago so that .oga would
be the preferred .3 file extension.  .ogg is still valid within the context of the
specification however as .ogg has been preserved for legacy compatibility.
.ogv is naturally markedly different internally and is for a different purpose.

Therefore .ogg and .oga are both specification valid OGG audio container formats,
with .oga being preferred (a lot of new software produces .oga's rather than .oggs).
 The trouble with android is that it can only recognise .ogg files although it cannot
playback a file with an .oga extension but will play it when you rename it .ogg.

This appears to have been fixed in Android 1.5 by the looks of it.  Thank you :)

Android 1.5 can play OGA files. But the default media player (i.e. Android media core
library) cannot read metadata from OGA files. I filed issue  #2933 (
http://code.google.com/p/android/issues/detail?id=2933 ) about this. I now think they
should merge the 2 issues.

Ah, this is only partially fixed.

The metadata reading of OGA and legacy OGG files does not appear to work.

For any enterprising individual that wants to look into this issue, you'll be looking
at a couple places:

frameworks/base/media/java/android/media/MediaScanner.java
frameworks/base/media/libmediaplayerservice/
external/opencore/android/mediascanner.cpp