diff --git a/drivers/strm/driver.go b/drivers/strm/driver.go
index c1b1f042..04716542 100644
--- a/drivers/strm/driver.go
+++ b/drivers/strm/driver.go
@@ -96,7 +96,7 @@ func (d *Strm) Init(ctx context.Context) error {
 		}
 	}
 
-	if d.Version != 3 {
+	if d.Version != 4 {
 		types := strings.Split("mp4,mkv,flv,avi,wmv,ts,rmvb,webm,mp3,flac,aac,wav,ogg,m4a,wma,alac", ",")
 		for _, ext := range types {
 			if _, ok := d.supportSuffix[ext]; !ok {
@@ -109,12 +109,12 @@ func (d *Strm) Init(ctx context.Context) error {
 		types = strings.Split("ass,srt,vtt,sub,strm", ",")
 		for _, ext := range types {
 			if _, ok := d.downloadSuffix[ext]; !ok {
-				d.supportSuffix[ext] = struct{}{}
+				d.downloadSuffix[ext] = struct{}{}
 				downloadTypes = append(downloadTypes, ext)
 			}
 		}
 		d.DownloadFileTypes = strings.Join(downloadTypes, ",")
-		d.Version = 3
+		d.Version = 4
 	}
 	return nil
 }
diff --git a/drivers/strm/util.go b/drivers/strm/util.go
index 54e47a68..a8c090fd 100644
--- a/drivers/strm/util.go
+++ b/drivers/strm/util.go
@@ -3,7 +3,6 @@ package strm
 import (
 	"context"
 	"fmt"
-
 	stdpath "path"
 	"strings"
 
@@ -69,11 +68,12 @@ func (d *Strm) convert2strmObjs(ctx context.Context, reqPath string, objs []mode
 		if !obj.IsDir() {
 			path = stdpath.Join(reqPath, obj.GetName())
 			ext := strings.ToLower(utils.Ext(name))
+			sourceExt := utils.SourceExt(name)
 			if _, ok := d.downloadSuffix[ext]; ok {
 				size = obj.GetSize()
 			} else if _, ok := d.supportSuffix[ext]; ok {
 				id = "strm"
-				name = strings.TrimSuffix(name, ext) + "strm"
+				name = strings.TrimSuffix(name, sourceExt) + "strm"
 				size = int64(len(d.getLink(ctx, path)))
 			} else {
 				continue
diff --git a/pkg/utils/path.go b/pkg/utils/path.go
index 2a104ff5..ec75501e 100644
--- a/pkg/utils/path.go
+++ b/pkg/utils/path.go
@@ -44,11 +44,15 @@ func IsSubPath(path string, subPath string) bool {
 }
 
 func Ext(path string) string {
+	return strings.ToLower(SourceExt(path))
+}
+
+func SourceExt(path string) string {
 	ext := stdpath.Ext(path)
 	if len(ext) > 0 && ext[0] == '.' {
 		ext = ext[1:]
 	}
-	return strings.ToLower(ext)
+	return ext
 }
 
 func EncodePath(path string, all ...bool) string {