refactoring

ffconv-a

@@ -3,5 +3,4 @@
 
 #IFS=$'\n'; for i in $(find -name '*.c'); do echo $i; done
 #find ./ -type f \( -iname '*.flac' -o -iname '*.mp3' -o -iname '*.ogg' -o -iname '*.m4a' -o -iname '*.wav' \) -exec sh -c 'i="{}"; ffmpeg -y -i "$i" "${i%.*}.opus" && rm -f "$i"' \;
-IFS=$'\n'; for i in $(find . -iname '*.mp3' -o -iname '*.wav' -o -iname '*.ogg' -o -iname '*.m4a' -o -iname '*.flac'); do ffmpeg -y -i $i ${i:r}.opus && rm $i; done 
+IFS=$'\n'; for i in $(find . -iregex '[.](mp3|wav|ogg|m4a|flac)$'); do ffmpeg -y -i $i ${i:r}.opus && rm $i; done 
-