[FFmpeg-cvslog] matroskaenc: Also validate chapter end time

[Vittorio Giovara]

ffmpeg | branch: master | Vittorio Giovara <vittorio.giovara at gmail.com> | Mon Mar  9 00:05:30 2015 +0000| [9f25a109922da43c1f81273a431d3b40cb5a785a] | committer: Vittorio Giovara

matroskaenc: Also validate chapter end time

This prevents it to be written as unsigned. Also add an error message.

CC: libav-stable at libav.org
Bug-Id: CID 1265717

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9f25a109922da43c1f81273a431d3b40cb5a785a
---

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

diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 8688616..f4d2665 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -920,8 +920,11 @@ static int mkv_write_chapters(AVFormatContext *s)
         int chapterstart = av_rescale_q(c->start, c->time_base, scale);
         int chapterend   = av_rescale_q(c->end,   c->time_base, scale);
         AVDictionaryEntry *t = NULL;
-        if (chapterstart < 0 || chapterstart > chapterend)
+        if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
+            av_log(s, AV_LOG_ERROR, "Invalid chapter start (%d) or end (%d).\n",
+                   chapterstart, chapterend);
             return AVERROR_INVALIDDATA;
+        }
 
         chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
         put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id);