diff --git a/libavformat/internal.h b/libavformat/internal.h
index 6b7f677950..8c2740be2e 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -625,9 +625,11 @@ int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf
  * The packet is not removed from the interleaving queue, but only
  * a pointer to it is returned.
  *
+ * @param ts_offset the ts difference between packet in the que and the muxer.
+ *
  * @return a pointer to the next packet, or NULL if no packet is queued
  *         for this stream.
  */
-const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
+const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset);
 
 #endif /* AVFORMAT_INTERNAL_H */
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index bf57174850..693851e153 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -4314,13 +4314,15 @@ static int mov_flush_fragment(AVFormatContext *s, int force)
     for (i = 0; i < s->nb_streams; i++) {
         MOVTrack *track = &mov->tracks[i];
         if (!track->end_reliable) {
-            const AVPacket *next = ff_interleaved_peek(s, i);
+            int64_t ts_offset;
+            const AVPacket *next = ff_interleaved_peek(s, i, &ts_offset);
             if (next) {
-                track->track_duration = next->dts - track->start_dts;
+                track->track_duration = next->dts - track->start_dts + ts_offset;
                 if (next->pts != AV_NOPTS_VALUE)
                     track->end_pts = next->pts;
                 else
                     track->end_pts = next->dts;
+                track->end_pts += ts_offset;
             }
         }
     }
diff --git a/libavformat/mux.c b/libavformat/mux.c
index 10b2750e3f..105d76240e 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -1041,12 +1041,20 @@ int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
     }
 }
 
-const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
+const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
 {
     AVPacketList *pktl = s->internal->packet_buffer;
     while (pktl) {
-        if (pktl->pkt.stream_index == stream)
-            return &pktl->pkt;
+        if (pktl->pkt.stream_index == stream) {
+            AVPacket *pkt = &pktl->pkt;
+            AVStream *st = s->streams[pkt->stream_index];
+            *ts_offset = st->mux_ts_offset;
+
+            if (s->output_ts_offset)
+                *ts_offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
+
+            return pkt;
+        }
         pktl = pktl->next;
     }
     return NULL;