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-rw-r--r--gst/isomp4/gstqtmux.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/gst/isomp4/gstqtmux.c b/gst/isomp4/gstqtmux.c
index bab212654..79b58d709 100644
--- a/gst/isomp4/gstqtmux.c
+++ b/gst/isomp4/gstqtmux.c
@@ -1006,7 +1006,7 @@ gst_qt_mux_prepare_caption_buffer (GstQTPad * qtpad, GstBuffer * buf,
gst_buffer_map (newbuf, &map, GST_MAP_WRITE);
- GST_WRITE_UINT32_BE (map.data, map.size + 8);
+ GST_WRITE_UINT32_BE (map.data, size + 8);
GST_WRITE_UINT32_LE (map.data + 4, FOURCC_ccdp);
memcpy (map.data + 8, inmap.data, inmap.size);