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-rw-r--r--libavformat/mxfenc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index b7e9449..6a27d2a 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -1820,7 +1820,7 @@ static void mxf_write_system_item(AVFormatContext *s)
avio_w8(pb, 0x04); // content package rate
avio_w8(pb, 0x00); // content package type
avio_wb16(pb, 0x00); // channel handle
- avio_wb16(pb, mxf->tc.start + frame); // continuity count
+ avio_wb16(pb, (mxf->tc.start + frame) & 0xFFFF); // continuity count, supposed to overflow
if (mxf->essence_container_count > 1)
avio_write(pb, multiple_desc_ul, 16);
else {
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