BGE VideoTexture: Fix for loading PNG (and possibly other) files.

source/gameengine/VideoTexture/VideoFFmpeg.cpp

@@ -1005,9 +1005,20 @@ AVFrame *VideoFFmpeg::grabFrame(long position)
 	{
 		if (packet.stream_index == m_videoStream) 
 		{
-			avcodec_decode_video2(m_codecCtx, 
-				m_frame, &frameFinished, 
+			if (m_isImage)
+			{
+				// If we're an image, we're probably not going to be here often,
+				// so we don't want to deal with delayed frames from threading.
+				// There might be a better way to handle this, but I'll leave that
+				// for people more knowledgeable with ffmpeg than myself. We don't
+				// need threading for a single image anyways.
+				m_codecCtx->thread_count = 1;
+			}
+
+			avcodec_decode_video2(m_codecCtx,
+				m_frame, &frameFinished,
 				&packet);
+
 			// remember dts to compute exact frame number
 			dts = packet.dts;
 			if (frameFinished && !posFound)