diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 60c3c0e62f..098e2d2681 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2032,7 +2032,8 @@ static int mov_write_minf_tag(AVIOContext *pb, MOVTrack *track)
     return update_size(pb, pos);
 }
 
-static int mov_write_mdhd_tag(AVIOContext *pb, MOVTrack *track)
+static int mov_write_mdhd_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              MOVTrack *track)
 {
     int version = track->track_duration < INT32_MAX ? 0 : 1;
 
@@ -2051,8 +2052,10 @@ static int mov_write_mdhd_tag(AVIOContext *pb, MOVTrack *track)
         avio_wb32(pb, track->time); /* modification time */
     }
     avio_wb32(pb, track->timescale); /* time scale (sample rate for audio) */
-    if (!track->entry)
+    if (!track->entry && mov->mode == MODE_ISM)
         (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else if (!track->entry)
+        (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
     else
         (version == 1) ? avio_wb64(pb, track->track_duration) : avio_wb32(pb, track->track_duration); /* duration */
     avio_wb16(pb, track->language); /* language */
@@ -2068,12 +2071,13 @@ static int mov_write_mdhd_tag(AVIOContext *pb, MOVTrack *track)
     return 32;
 }
 
-static int mov_write_mdia_tag(AVIOContext *pb, MOVTrack *track)
+static int mov_write_mdia_tag(AVIOContext *pb, MOVMuxContext *mov,
+                              MOVTrack *track)
 {
     int64_t pos = avio_tell(pb);
     avio_wb32(pb, 0); /* size */
     ffio_wfourcc(pb, "mdia");
-    mov_write_mdhd_tag(pb, track);
+    mov_write_mdhd_tag(pb, mov, track);
     mov_write_hdlr_tag(pb, track);
     mov_write_minf_tag(pb, track);
     return update_size(pb, pos);
@@ -2134,8 +2138,10 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
     }
     avio_wb32(pb, track->track_id); /* track-id */
     avio_wb32(pb, 0); /* reserved */
-    if (!track->entry)
+    if (!track->entry && mov->mode == MODE_ISM)
         (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else if (!track->entry)
+        (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
     else
         (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
 
@@ -2389,7 +2395,7 @@ static int mov_write_trak_tag(AVIOContext *pb, MOVMuxContext *mov,
         mov_write_edts_tag(pb, mov, track);  // PSP Movies and several other cases require edts box
     if (track->tref_tag)
         mov_write_tref_tag(pb, track);
-    mov_write_mdia_tag(pb, track);
+    mov_write_mdia_tag(pb, mov, track);
     if (track->mode == MODE_PSP)
         mov_write_uuid_tag_psp(pb, track); // PSP Movies require this uuid box
     if (track->tag == MKTAG('r','t','p',' '))
diff --git a/tests/ref/fate/sub-movtextenc b/tests/ref/fate/sub-movtextenc
index 09d92beb34..e74b8f2b35 100644
--- a/tests/ref/fate/sub-movtextenc
+++ b/tests/ref/fate/sub-movtextenc
@@ -1 +1 @@
-d26e73c420c40a00225060d2e6532df9
+bb762c178bd8c437a9101c748c1ccb4d