From ccb919f86cb5c046f7453400db10feb23c6ce483 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 12 Jul 2022 14:37:15 +0200
Subject: lavc/libx265: pass through frame durations to encoded packets

---
 libavcodec/libx265.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c
index 6d2590dd7f..b10fff2ebe 100644
--- a/libavcodec/libx265.c
+++ b/libavcodec/libx265.c
@@ -38,6 +38,11 @@
 #include "packet_internal.h"
 #include "sei.h"
 
+typedef struct ReorderedData {
+    int64_t reordered_opaque;
+    int64_t duration;
+} ReorderedData;
+
 typedef struct libx265Context {
     const AVClass *class;
 
@@ -506,6 +511,7 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     x265_picture x265pic;
     x265_picture x265pic_out = { 0 };
     x265_nal *nal;
+    ReorderedData *rd;
     uint8_t *dst;
     int pict_type;
     int payload = 0;
@@ -536,16 +542,17 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         if (ret < 0)
             return ret;
 
-        if (pic->reordered_opaque) {
-            x265pic.userData = av_malloc(sizeof(pic->reordered_opaque));
-            if (!x265pic.userData) {
-                av_freep(&x265pic.quantOffsets);
-                return AVERROR(ENOMEM);
-            }
-
-            memcpy(x265pic.userData, &pic->reordered_opaque, sizeof(pic->reordered_opaque));
+        rd = av_mallocz(sizeof(*rd));
+        if (!rd) {
+            av_freep(&x265pic.quantOffsets);
+            return AVERROR(ENOMEM);
         }
 
+        rd->duration         = pic->duration;
+        rd->reordered_opaque = pic->reordered_opaque;
+
+        x265pic.userData = rd;
+
         if (ctx->udu_sei) {
             for (i = 0; i < pic->nb_side_data; i++) {
                 AVFrameSideData *side_data = pic->side_data[i];
@@ -633,8 +640,10 @@ static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 
     ff_side_data_set_encoder_stats(pkt, x265pic_out.frameData.qp * FF_QP2LAMBDA, NULL, 0, pict_type);
 
-    if (x265pic_out.userData) {
-        memcpy(&avctx->reordered_opaque, x265pic_out.userData, sizeof(avctx->reordered_opaque));
+    rd = x265pic_out.userData;
+    if (rd) {
+        avctx->reordered_opaque = rd->reordered_opaque;
+        pkt->duration           = rd->duration;
         av_freep(&x265pic_out.userData);
     } else
         avctx->reordered_opaque = 0;
-- 
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