From 14156e607d4941079a400c3969173518ebb6f6ed Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 10 Dec 2018 10:15:27 +0100
Subject: [PATCH] avformat/mxfenc: calculate and store DAR from user SAR

---
 libavformat/mxfenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index e481b19ff3..4f9f353ffc 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -2412,6 +2412,11 @@ static int mxf_write_header(AVFormatContext *s)
             sc->v_chroma_sub_sample = 2;
             sc->color_siting = 0xFF;
 
+            if (st->codecpar->sample_aspect_ratio.num && st->codecpar->sample_aspect_ratio.den) {
+                sc->aspect_ratio = av_mul_q(st->codecpar->sample_aspect_ratio,
+                                            av_make_q(st->codecpar->width, st->codecpar->height));
+            }
+
             if (pix_desc) {
                 sc->component_depth     = pix_desc->comp[0].depth;
                 sc->h_chroma_sub_sample = 1 << pix_desc->log2_chroma_w;