fix(video): encode at least one frame before capture reinit (#3300)

src/video.cpp

@@ -1857,7 +1857,14 @@ namespace video {
     }
 
     while (true) {
-      if (shutdown_event->peek() || reinit_event.peek() || !images->running()) {
+      // Break out of the encoding loop if any of the following are true:
+      // a) The stream is ending
+      // b) Sunshine is quitting
+      // c) The capture side is waiting to reinit and we've encoded at least one frame
+      //
+      // If we have to reinit before we have received any captured frames, we will encode
+      // the blank dummy frame just to let Moonlight know that we're alive.
+      if (shutdown_event->peek() || !images->running() || (reinit_event.peek() && frame_nr > 1)) {
         break;
       }