diff --git a/src/cmd/asses/main.go b/src/cmd/asses/main.go
index 8a8dd1b..c858ce6 100644
--- a/src/cmd/asses/main.go
+++ b/src/cmd/asses/main.go
@@ -2,15 +2,51 @@ package asses
 
 import (
 	"context"
-	"io"
+	"io/fs"
+	"path"
+	"path/filepath"
 	"show-rss/src/asses"
 	"show-rss/src/cron"
 )
 
+var rootDs = []string{
+	"/volume1/video/Bel/Anime",
+	"/volume1/video/QT/TV",
+}
+
+type CB func(context.Context, string) error
+
 func Main(ctx context.Context) error {
 	return cron.Cron(ctx, asses.Next, One)
 }
 
 func One(ctx context.Context) error {
-	return io.EOF
+	return OneWith(ctx, rootDs, asses.One)
+}
+
+func OneWith(ctx context.Context, rootds []string, cb CB) error {
+	for _, rootd := range rootds {
+		if err := one(ctx, rootd, cb); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func one(ctx context.Context, rootd string, cb CB) error {
+	return filepath.WalkDir(rootd, func(p string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if d.IsDir() {
+			return nil
+		}
+
+		if path.Ext(p) != ".mkv" {
+			return nil
+		}
+
+		return cb(ctx, p)
+	})
 }
diff --git a/src/cmd/asses/main_test.go b/src/cmd/asses/main_test.go
index cef415b..0533928 100644
--- a/src/cmd/asses/main_test.go
+++ b/src/cmd/asses/main_test.go
@@ -1,8 +1,28 @@
 package asses_test
 
 import (
+	"context"
+	"os"
+	"path"
+	"show-rss/src/cmd/asses"
+	"show-rss/src/db"
 	"testing"
 )
 
-func TestOne(t *testing.T) {
+func TestOneWith(t *testing.T) {
+	ctx := db.Test(t, context.Background())
+
+	d := t.TempDir()
+	os.MkdirAll(path.Join(d, "a", "b", "c"), os.ModePerm)
+	os.WriteFile(path.Join(d, "a", "f.mkv"), []byte{}, os.ModePerm)
+
+	if err := asses.OneWith(ctx, []string{d}, func(_ context.Context, p string) error {
+		t.Logf("%q", p)
+		if _, err := os.Stat(p); err != nil {
+			return err
+		}
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
 }