diff --git a/iOS/QGVAPlayer/QGVAPlayer/Classes/Views/Metal/Vapx/QGVAPMetalRenderer.m b/iOS/QGVAPlayer/QGVAPlayer/Classes/Views/Metal/Vapx/QGVAPMetalRenderer.m
index 48b295bd..2541ce75 100644
--- a/iOS/QGVAPlayer/QGVAPlayer/Classes/Views/Metal/Vapx/QGVAPMetalRenderer.m
+++ b/iOS/QGVAPlayer/QGVAPlayer/Classes/Views/Metal/Vapx/QGVAPMetalRenderer.m
@@ -120,6 +120,7 @@ - (void)renderPixelBuffer:(CVPixelBufferRef)pixelBuffer metalLayer:(CAMetalLayer
     }
     if (self.vertexBuffer == nil || self.yuvMatrixBuffer == nil) {
         VAP_Error(kQGVAPModuleCommon, @"quit rendering cuz vertexBuffer:%p or yuvMatrixBuffer:%p is nil!", self.vertexBuffer, self.yuvMatrixBuffer);
+        [renderEncoder endEncoding];
         return ;
     }