From 75cdd597eb06e2e742613729bb2a1a3c363b12d5 Mon Sep 17 00:00:00 2001
From: Jason Z <68634004+tiffsequence@users.noreply.github.com>
Date: Fri, 9 Oct 2026 20:28:08 -0700
Subject: [PATCH] add box patch test appending into a box without children

New mp4box-patch_box subtest "add-box-empty-container": appends a 'name'
box into the tmcd sample entry created by -add self:tc, which has no child
box. Fails on gpac master (patch silently dropped), passes with the fix
for gpac/gpac#3970.
---
 .../mp4box-patch_box-add-box-empty-container.hash    |  1 +
 media/boxpatch/box_add_empty_container.xml           | 12 ++++++++++++
 scripts/mp4box-boxpatch.sh                           |  5 +++++
 3 files changed, 18 insertions(+)
 create mode 100644 hash_refs/mp4box-patch_box-add-box-empty-container.hash
 create mode 100644 media/boxpatch/box_add_empty_container.xml

diff --git a/hash_refs/mp4box-patch_box-add-box-empty-container.hash b/hash_refs/mp4box-patch_box-add-box-empty-container.hash
new file mode 100644
index 00000000..a1fecfca
--- /dev/null
+++ b/hash_refs/mp4box-patch_box-add-box-empty-container.hash
@@ -0,0 +1 @@
+��f���g�E�߻dV��
\ No newline at end of file
diff --git a/media/boxpatch/box_add_empty_container.xml b/media/boxpatch/box_add_empty_container.xml
new file mode 100644
index 00000000..cf52657d
--- /dev/null
+++ b/media/boxpatch/box_add_empty_container.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<GPACBOXES>
+
+<!-- append into a box without children: the tmcd sample entry created by self:tc -->
+<Box path="trak.mdia.minf.stbl.stsd.tmcd" trackID="2">
+<BS fcc="name"/>
+<BS value="8" bits="16"/>
+<BS value="0" bits="16"/>
+<BS text="MYTAPE01"/>
+</Box>
+
+</GPACBOXES>
diff --git a/scripts/mp4box-boxpatch.sh b/scripts/mp4box-boxpatch.sh
index 80e73641..a8c053f8 100755
--- a/scripts/mp4box-boxpatch.sh
+++ b/scripts/mp4box-boxpatch.sh
@@ -39,6 +39,11 @@ dst2="$TEMP_DIR/fixed.mp4"
 do_test "$MP4BOX -no-check -patch $MEDIA_DIR/boxpatch/hdlr_add.xml $dst -out $dst2" "patch-hdlr"
 do_hash_test $dst "patch-hdlr"
 
+#append into a box with no child box yet (tmcd sample entry)
+mp4file1="$TEMP_DIR/add-empty-container.mp4"
+do_test "$MP4BOX -add $MEDIA_DIR/auxiliary_files/enst_video.h264 -add self:tc=25,0,0,0,0:fps=25 -patch $MEDIA_DIR/boxpatch/box_add_empty_container.xml -new $mp4file1" "add-box-empty-container"
+do_hash_test $mp4file1 "add-box-empty-container"
+
 test_end