fix: restore metadata tags and sanitize output filenames

cmd/videnc/main.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"regexp"
 	"syscall"
 
 	"videnc-vibe/internal/config"
@@ -148,9 +149,9 @@ func processFile(inputPath string, cfg *types.Config, enc *encoder.Encoder, meta
 	if meta.IMDBID == "" || meta.Title == "Unknown" {
 		outFilename = fmt.Sprintf("%s.nometadata.mkv", generateRandomString(8))
 	} else if isSeries {
-		outFilename = fmt.Sprintf("%s.S%sE%s.mkv", meta.Collection, season, episode)
+		outFilename = fmt.Sprintf("%s.S%sE%s.mkv", sanitizeFilename(meta.Collection), season, episode)
 	} else {
-		outFilename = fmt.Sprintf("%s.%s.mkv", meta.Title, meta.IMDBID)
+		outFilename = fmt.Sprintf("%s.%s.mkv", sanitizeFilename(meta.Title), meta.IMDBID)
 	}
 
 	finalOutput := filepath.Join(cfg.Paths.Output, outFilename)
@@ -177,3 +178,8 @@ func generateRandomString(length int) string {
 	rand.Read(bytes)
 	return hex.EncodeToString(bytes)[:length]
 }
+
+func sanitizeFilename(name string) string {
+	reg := regexp.MustCompile(`[^a-zA-Z0-9\-äöÄÖ]`)
+	return reg.ReplaceAllString(name, "")
+}