From b295ec31f351d8cc2dfad6f7c0cb261c1b19b7d9 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 7 Jul 2023 09:29:58 +0200
Subject: [PATCH] fftools/ffmpeg_filter: only flush vsync code if encoding
 actually started

Otherwise this has no effect.

Will be useful in following commits.
---
 fftools/ffmpeg_filter.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 1b51ed55bd..1ca9728390 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -1754,10 +1754,10 @@ int reap_filters(int flush)
                 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
                     av_log(fgp, AV_LOG_WARNING,
                            "Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
-                } else if (flush && ret == AVERROR_EOF) {
-                    if (av_buffersink_get_type(filter) == AVMEDIA_TYPE_VIDEO)
-                        enc_frame(ost, NULL);
-                }
+                } else if (flush && ret == AVERROR_EOF && ofp->got_frame &&
+                           av_buffersink_get_type(filter) == AVMEDIA_TYPE_VIDEO)
+                    enc_frame(ost, NULL);
+
                 break;
             }
             if (ost->finished) {