diff --git a/src/QtAV/VideoRenderer.h b/src/QtAV/VideoRenderer.h
index 1baee2da..f8277ba0 100644
--- a/src/QtAV/VideoRenderer.h
+++ b/src/QtAV/VideoRenderer.h
@@ -170,12 +170,6 @@ private:
     void setInSize(int width, int height); //private? for internal use only, called by VideoThread.
     //qreal sourceAspectRatio() const;//TODO: from AVCodecContext
     //we don't need api like QSize sourceSize() const. you should get them from player or avinfo(not implemented)
-
-    //private?  for internal use only, called by VideoThread.
-    QSize lastSize() const;
-    int lastWidth() const;
-    int lastHeight() const;
-
 };
 
 } //namespace QtAV
diff --git a/src/VideoRenderer.cpp b/src/VideoRenderer.cpp
index 14743ec2..f5ed514a 100644
--- a/src/VideoRenderer.cpp
+++ b/src/VideoRenderer.cpp
@@ -144,23 +144,6 @@ void VideoRenderer::setInSize(int width, int height)
     d.aspect_ratio_changed = false; //TODO: why graphicsitemrenderer need this? otherwise aspect_ratio_changed is always true?
 }
 
-QSize VideoRenderer::lastSize() const
-{
-    DPTR_D(const VideoRenderer);
-    return QSize(d.src_width, d.src_height);
-}
-
-int VideoRenderer::lastWidth() const
-{
-    DPTR_D(const VideoRenderer);
-    return d.src_width;
-}
-int VideoRenderer::lastHeight() const
-{
-    DPTR_D(const VideoRenderer);
-    return  d.src_height;
-}
-
 bool VideoRenderer::open()
 {
     return true;