libobs: Log output frame count instead of encoded count

Instead of logging the relative encoded count (which is susceptible to
integer overflow), log the output frame count instead.  If there's an
issue with encoding, it'll show up when all encoding stops regardless.

libobs/obs-output.c

@@ -283,28 +283,36 @@ static void log_frame_info(struct obs_output *output)
 {
 	struct obs_core_video *video = &obs->video;
 
-	uint32_t video_frames  = video_output_get_total_frames(output->video);
-
-	uint32_t total   = video_frames  - output->starting_frame_count;
-
 	uint32_t drawn  = video->total_frames - output->starting_drawn_count;
 	uint32_t lagged = video->lagged_frames - output->starting_lagged_count;
 
 	int dropped = obs_output_get_frames_dropped(output);
+	int total = output->total_frames;
 
 	double percentage_lagged = 0.0f;
 	double percentage_dropped = 0.0f;
 
-	if (total)
-		percentage_dropped = (double)dropped / (double)total * 100.0;
 	if (drawn)
 		percentage_lagged = (double)lagged  / (double)drawn * 100.0;
+	if (dropped)
+		percentage_dropped = (double)dropped / (double)total * 100.0;
 
 	blog(LOG_INFO, "Output '%s': stopping", output->context.name);
-	blog(LOG_INFO, "Output '%s': Total encoded frames: %"PRIu32,
-			output->context.name, total);
-	blog(LOG_INFO, "Output '%s': Total drawn frames: %"PRIu32,
-			output->context.name, drawn);
+	if (!dropped || !total)
+		blog(LOG_INFO, "Output '%s': Total frames output: %d",
+				output->context.name, total);
+	else
+		blog(LOG_INFO, "Output '%s': Total frames output: %d"
+				" (%d attempted)",
+				output->context.name, total - dropped, total);
+
+	if (!lagged || !drawn)
+		blog(LOG_INFO, "Output '%s': Total drawn frames: %"PRIu32,
+				output->context.name, drawn);
+	else
+		blog(LOG_INFO, "Output '%s': Total drawn frames: %"PRIu32
+				" (%"PRIu32" attempted)",
+				output->context.name, drawn - lagged, drawn);
 
 	if (drawn && lagged)
 		blog(LOG_INFO, "Output '%s': Number of lagged frames due "