From: Limin Wang <lance.lmw...@gmail.com>
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
libavformat/movenc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 32e8109268..1a97e7c883 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5251,10 +5251,11 @@ static int mov_flush_fragment(AVFormatContext *s, int
force)
return 0;
}
- buf_size = avio_get_dyn_buf(mov->mdat_buf, &buf);
+ if ((buf_size = avio_get_dyn_buf(mov->mdat_buf, &buf)) > 0) {
avio_wb32(s->pb, buf_size + 8);
ffio_wfourcc(s->pb, "mdat");
avio_write(s->pb, buf, buf_size);
+ }
ffio_free_dyn_buf(&mov->mdat_buf);
if (mov->flags & FF_MOV_FLAG_GLOBAL_SIDX)
--
2.21.0
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