--- a/media/webrtc/signaling/src/media-conduit/WebrtcGmpVideoCodec.cpp
+++ b/media/webrtc/signaling/src/media-conduit/WebrtcGmpVideoCodec.cpp
@@ -620,16 +620,20 @@ WebrtcGmpVideoDecoder::Decode_g(const we
                                 int64_t aRenderTimeMs)
 {
   MOZ_ASSERT(mHost);
   if (!mGMP) {
     // destroyed via Terminate()
     return WEBRTC_VIDEO_CODEC_ERROR;
   }
 
+  if (!aInputImage._length) {
+    return WEBRTC_VIDEO_CODEC_ERROR;
+  }
+
   GMPVideoFrame* ftmp = nullptr;
   GMPErr err = mHost->CreateFrame(kGMPEncodedVideoFrame, &ftmp);
   if (err != GMPNoErr) {
     return WEBRTC_VIDEO_CODEC_ERROR;
   }
 
   UniquePtr<GMPVideoEncodedFrame> frame(static_cast<GMPVideoEncodedFrame*>(ftmp));
   err = frame->CreateEmptyFrame(aInputImage._length);