diff --git a/main.go b/main.go
index 66066ab..201266c 100644
--- a/main.go
+++ b/main.go
@@ -134,7 +134,20 @@ func downloadUgoiraCmd(args []string, flags CliFlags) {
 }
 
 func ugoira2videoCmd(args []string, flags CliFlags) {
-
+	if len(args) < 2 {
+		die("expected ugoira zip file and manifest JSON")
+	}
+	_, manifestFileName := args[0], args[1]
+	mfp, err := os.Open(manifestFileName)
+	if err != nil {
+		die("Could not open manifest file: %s", err)
+	}
+	defer mfp.Close()
+	manifestData, err := io.ReadAll(mfp)
+	if err != nil {
+		die("Could not read manifest: %s", err)
+	}
+	ugoira2video(decodeUgoiraManifest(manifestData))
 }
 
 func main() {