add per-stream metadata (needed with recent FFmpeg and Ogg container, maybe other containers too)
add per-stream metadata (needed with recent FFmpeg and Ogg container, maybe other containers too)

GeeXboX/libvalhalla,GeeXboX/libvalhalla,GeeXboX/libvalhalla,GeeXboX/libvalhalla,GeeXboX/libvalhalla