@@ -1342,6 +1342,7 @@ static void print_final_stats(int64_t total_size)

     uint64_t data_size = 0;

     float percent = -1.0;

     int i, j;

+    int pass1_used = 1;

     for (i = 0; i < nb_output_streams; i++) {

         OutputStream *ost = output_streams[i];

@@ -1353,6 +1354,9 @@ static void print_final_stats(int64_t total_size)

         }

         extra_size += ost->enc_ctx->extradata_size;

         data_size  += ost->data_size;

+        if (   (ost->enc_ctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))

+            != CODEC_FLAG_PASS1)

+            pass1_used = 0;

     }

     if (data_size && total_size>0 && total_size >= data_size)

@@ -1439,7 +1443,12 @@ static void print_final_stats(int64_t total_size)

                total_packets, total_size);

     }

     if(video_size + data_size + audio_size + subtitle_size + extra_size == 0){

-        av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)\n");

+        av_log(NULL, AV_LOG_WARNING, "Output file is empty, nothing was encoded ");

+        if (pass1_used) {

+            av_log(NULL, AV_LOG_WARNING, "\n");

+        } else {

+            av_log(NULL, AV_LOG_WARNING, "(check -ss / -t / -frames parameters if used)\n");

+        }

     }

 }