[FFmpeg-devel] [PATCH] avformat/concatdec: avoid NULL dereference when failed to open file.

[Zhang Rui]

---
 libavformat/concatdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index e109524..f07cfd7 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -482,6 +482,9 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
     ConcatStream *cs;
     AVStream *st;
 
+    if (!cat->avf)
+        return AVERROR(EIO);
+
     while (1) {
         ret = av_read_frame(cat->avf, pkt);
         if (ret == AVERROR_EOF) {
-- 
2.0.0