diff --git a/main.cc b/main.cc
index 5fcf53d..f246056 100644
--- a/main.cc
+++ b/main.cc
@@ -155,8 +155,8 @@ int main(int argc, char** const argv)
 	case FileType::VIDEO:
 	{
 		InitVideo(window, targetFilepath, decoderParam, openglVideoParam, shaderService);
-		auto& time_base = decoderParam.fmtCtx->streams[decoderParam.videoStreamIndex]->time_base;
-		framerate = (double)time_base.num / time_base.den;
+		auto stream_frame_rate = decoderParam.fmtCtx->streams[decoderParam.videoStreamIndex]->avg_frame_rate;
+		framerate = static_cast<double>(stream_frame_rate.den) / stream_frame_rate.num;
 		break;
 	}
 	case FileType::IMG:
@@ -202,7 +202,7 @@ int main(int argc, char** const argv)
 		case FileType::VIDEO:
 			OpenglRender(decoderParam, openglVideoParam, shaderService);
 			SDL_GL_SwapWindow(window);
-			std::this_thread::sleep_until(current_time + std::chrono::milliseconds((int)(framerate * 1000)));
+			std::this_thread::sleep_until(current_time + std::chrono::milliseconds(static_cast<int>(framerate * 1000)));
 			current_time = std::chrono::system_clock::now();
 			break;