icecast format conversions

src/freedombone-app-icecast

     cd ${1}
 
     echo $'Converting any mp3 files to ogg format'
-    find . -type f -name '*.mp3' -exec bash -c 'ffmpeg -i "$0" -c:a libvorbis -q:a 4 "${f/%mp3/ogg}' '{}' \;
+    find . -type f -name '*.mp3' -exec bash -c 'ffmpeg -i "$0" -c:a libvorbis -q:a 4 "${0/%mp3/ogg}"' '{}' \;
 
     echo $'Converting any mp4 files to ogv format'
-    find . -type f -name '*.mp4' -exec bash -c 'ffmpeg -i "$0" -c:a libvorbis -q:a 4 "${f/%mp4/ogv}' '{}' \;
+    find . -type f -name '*.mp4' -exec bash -c 'ffmpeg -i "$0" -c:a libvorbis -q:a 4 "${0/%mp3/ogv}"' '{}' \;
 
     chown -R icecast2:icecast $ICECAST_DIR
 }