conditional use of sox for video

lib/decode/decodeFile

@@ -3,7 +3,17 @@ decodeFile() {
 	case "$mimetype" in
 		'video/'*)
 			extractAudio
+			if (( ${destinationnormalize["$destination"]}))\
+			|| (
+			[ -n "${destinationfrequency["$destination"]}" ]\
+			&& (( ${rate:-0} != ${destinationfrequency["$destination"]}))\
+			) || (
+			[ -n "${destinationchannels["$destination"]}" ]\
+			&& (( ${channels:-0} != ${destinationchannels["$destination"]} ))
+			)
+			then
 				sox_needed=1
+			fi
 		;;
 		'audio/mpeg')
 			if [[ ${destinationformat[$destination]} = mp3 ]] \