1 files changed, 9 insertions, 0 deletions
diff --git a/framesequence/jni/FrameSequence_webp.h b/framesequence/jni/FrameSequence_webp.h
index 94dcc3b..a29574c 100644
--- a/framesequence/jni/FrameSequence_webp.h
+++ b/framesequence/jni/FrameSequence_webp.h
@@ -32,10 +32,16 @@ public:
     virtual ~FrameSequence_webp();
 
     virtual int getWidth() const {
+        if (!mDemux) {
+            return 0;
+        }
         return WebPDemuxGetI(mDemux, WEBP_FF_CANVAS_WIDTH);
     }
 
     virtual int getHeight() const {
+        if (!mDemux) {
+            return 0;
+        }
         return WebPDemuxGetI(mDemux, WEBP_FF_CANVAS_HEIGHT);
     }
 
@@ -44,6 +50,9 @@ public:
     }
 
     virtual int getFrameCount() const {
+        if (!mDemux) {
+            return 0;
+        }
         return WebPDemuxGetI(mDemux, WEBP_FF_FRAME_COUNT);
     }