diff --git a/plugins/obs-ffmpeg/ffmpeg-mux/ffmpeg-mux.c b/plugins/obs-ffmpeg/ffmpeg-mux/ffmpeg-mux.c
index 755b67c2f..b3c5c8857 100644
--- a/plugins/obs-ffmpeg/ffmpeg-mux/ffmpeg-mux.c
+++ b/plugins/obs-ffmpeg/ffmpeg-mux/ffmpeg-mux.c
@@ -316,6 +316,7 @@ static void create_video_stream(struct ffmpeg_mux *ffm)
 		(AVRational){ffm->params.fps_den, ffm->params.fps_num};
 
 	ffm->video_stream->time_base = context->time_base;
+	ffm->video_stream->avg_frame_rate = av_inv_q(context->time_base);
 
 	if (ffm->output->oformat->flags & AVFMT_GLOBALHEADER)
 		context->flags |= CODEC_FLAG_GLOBAL_H;