fftools/ffmpeg: attach filter framerate to frames

This way the encoder does not need to reach backward into the filter.

1 files changed, 10 insertions, 0 deletions

diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 1150f6fc65..a2b45a14b8 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -1711,6 +1711,16 @@ int reap_filters(int flush)
                            tb.num, tb.den);
             }
 
+            if (ost->type == AVMEDIA_TYPE_VIDEO) {
+                FrameData *fd = frame_data(filtered_frame);
+                if (!fd) {
+                    av_frame_unref(filtered_frame);
+                    report_and_exit(AVERROR(ENOMEM));
+                }
+
+                fd->frame_rate_filter = av_buffersink_get_frame_rate(filter);
+            }
+
             enc_frame(ost, filtered_frame);
             av_frame_unref(filtered_frame);
         }