set attributes properly and add checks

modules/video/src/video.cpp

@@ -32,7 +32,7 @@ VideoPlayer::VideoPlayer() {
   window = nullptr;
   renderer = nullptr;
   texture = nullptr;
-  SwsContext* swsContext = nullptr;
+  swsContext = nullptr;
   frame = nullptr;
   videoStream = -1;
 }
@@ -147,6 +147,12 @@ bool loadVideo(VideoPlayer& player, const char* filename) {
       player.formatContext->streams[player.videoStream]->time_base;
   player.frameDuration = av_q2d(player.timeBase);
 
+  player.frame = av_frame_alloc();
+  if (!player.frame) {
+    std::cerr << "Failed to allocate frame\n";
+    return false;
+  }
+
   return true;
 }