[FFmpeg-devel] [PATCH 4/5] avformat/movenc: check the return value of avio_get_dyn_buf()

[lance.lmwang at gmail.com]

From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at 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