diff --git a/LFLiveKit/Vendor/GPUImage/iOS/GPUImageView.m b/LFLiveKit/Vendor/GPUImage/iOS/GPUImageView.m
index e092b80e..207661dd 100755
--- a/LFLiveKit/Vendor/GPUImage/iOS/GPUImageView.m
+++ b/LFLiveKit/Vendor/GPUImage/iOS/GPUImageView.m
@@ -232,6 +232,7 @@ - (void)presentFramebuffer;
 
 - (void)recalculateViewGeometry;
 {
+    dispatch_async(dispatch_get_main_queue(), ^(void){
     runSynchronouslyOnVideoProcessingQueue(^{
         CGFloat heightScaling, widthScaling;
         
@@ -271,6 +272,7 @@ - (void)recalculateViewGeometry;
         imageVertices[6] = widthScaling;
         imageVertices[7] = heightScaling;
     });
+    });
     
 //    static const GLfloat imageVertices[] = {
 //        -1.0f, -1.0f,