audiokonverter is a service menu (and also a commandline utility) to easily convert from MP3, OGG, AMR, AAC, M4A, FLAC, WMA, RealAudio, Musepack, Wavpack, WAV and movies to MP3, OGG, M4A, WAV and FLAC in Konqueror by right-clicking on them. It needs ffmpeg, oggenc, oggdec, faac, faad, flac, mplayer and lame to work. id3lib is optional for full functionality. Also optional are vorbis-tools and metaflac for handling other metadata. See README how/where to get that software.