[FFmpeg-cvslog] avformat/utils: Print verbose error message if stream count exceeds max_streams

[Michael Niedermayer]

ffmpeg | branch: release/3.2 | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 10 20:15:13 2016 +0100| [9519b2560e1839644a74162ee52f2116532d964a] | committer: Michael Niedermayer

avformat/utils: Print verbose error message if stream count exceeds max_streams

Reviewed-by: Andreas Cadhalpun <andreas.cadhalpun at googlemail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit f0bdd538712d8ed34120ab2b7bd1409fcc99fb45)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9519b2560e1839644a74162ee52f2116532d964a
---

 libavformat/utils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index 20712bb..1df0ec0 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -4213,8 +4213,11 @@ AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
     int i;
     AVStream **streams;
 
-    if (s->nb_streams >= FFMIN(s->max_streams, INT_MAX/sizeof(*streams)))
+    if (s->nb_streams >= FFMIN(s->max_streams, INT_MAX/sizeof(*streams))) {
+        if (s->max_streams < INT_MAX/sizeof(*streams))
+            av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter (%d), see the documentation if you wish to increase it\n", s->max_streams);
         return NULL;
+    }
     streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
     if (!streams)
         return NULL;