[FFmpeg-cvslog] avformat/mov: Skip stsd adjustment without chunks

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Tue Apr 16 22:15:14 2019 +0200| [05a90821d05f88bd0a290878d1aa2c459aed67ac] | committer: Michael Niedermayer

avformat/mov: Skip stsd adjustment without chunks

Fixes: Assertion failure
Fixes: clusterfuzz-testcase-minimized-media_pipeline_integration_fuzzer-5683096400822272

Found-by: Clusterfuzz
Reported-by: Dan Sanders <sandersd at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 18a567c369d74af5ef651b07c4c5615f5598616b)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=05a90821d05f88bd0a290878d1aa2c459aed67ac
---

 libavformat/mov.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index caba256161..9c5442988c 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -7879,6 +7879,7 @@ static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp,
     }
 
     /* adjust stsd index */
+    if (sc->chunk_count) {
     time_sample = 0;
     for (i = 0; i < sc->stsc_count; i++) {
         int64_t next = time_sample + mov_get_stsc_samples(sc, i);
@@ -7890,6 +7891,7 @@ static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp,
         av_assert0(next == (int)next);
         time_sample = next;
     }
+    }
 
     return sample;
 }