Now that media-sound/moc-2.5.0_alpha4_p20111211 is stable (bug: 403747) I would suggest to add newer snapshot of moc which would include big overhaul of ffmpeg decoder allowing to playback addional audio/video formats (and several other bugfixes as well). It should also build now against all reasonable ffmpeg/libav versions >=0.7. From upstream: "I have today commit made a series of commits (r2383 to r2410) to SVN which represent a major overhaul of the FFmpeg/LibAV decoder. The decoder now supports a number of additional audio formats (including the requested WV and APE), and several video formats (AVI, FLV, MP4, REC and VOB) from which the audio will be played." http://moc.daper.net/node/824
New snapshot added to CVS.