Fix bug that caused that in every case the .vtt format of the subtitle is downloaded

youtubedl.go

@@ -54,7 +54,7 @@ func (e ErrYoutubeDL) Error() string {
 
 func runYoutubeDL(args []string) (output []byte, err error) {
 	cmd := exec.Command("youtube-dl", args...)
-	log.Trace(args)
+	log.Info(args)
 	output, err = cmd.CombinedOutput()
 	log.Trace(string(output))
 	if err != nil {
@@ -250,9 +250,9 @@ func GetSubtitle(auto bool, id string, language string) (sub *astisub.Subtitles,
 			continue
 		}
 		filename := filepath.Join("/tmp", "sub-"+id)
-		file := filename + "." + language + "." + SubVTT.String()
+		file := filename + "." + language + "." + format
 
-		err := downloadSubtitle(auto, id, language, SubVTT.String(), filename)
+		err := downloadSubtitle(auto, id, language, format, filename)
 		defer os.Remove(file)
 		if err != nil {
 			log.Warn(err)