[FFmpeg-cvslog] avformat/mov: fix crash when trying to get a fragment time for a non-existing fragment

[Eugene Zemtsov]

ffmpeg | branch: release/7.1 | Eugene Zemtsov <eugene at chromium.org> | Thu Oct 24 18:54:10 2024 -0700| [9328e07ad5196e2992c348b518e046c539830ca5] | committer: Marth64

avformat/mov: fix crash when trying to get a fragment time for a non-existing fragment

Reviewed-by: Dale Curtis <dalecurtis at chromium.org>
Reviewed-by: Marth64 <marth64 at proxyid.net>
Signed-off-by: Marth64 <marth64 at proxyid.net>
(cherry picked from commit 7c9bde1d0d26ffa74b6791666c3a27c6d5d5019f)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9328e07ad5196e2992c348b518e046c539830ca5
---

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

diff --git a/libavformat/mov.c b/libavformat/mov.c
index a4c5a2a93c..ff32d4160e 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1644,6 +1644,8 @@ static int64_t get_frag_time(AVFormatContext *s, AVStream *dst_st,
     // to fragments that referenced this stream in the sidx
     if (sc->has_sidx) {
         frag_stream_info = get_frag_stream_info(frag_index, index, sc->id);
+        if (!frag_stream_info)
+            return AV_NOPTS_VALUE;
         if (frag_stream_info->sidx_pts != AV_NOPTS_VALUE)
             return frag_stream_info->sidx_pts;
         if (frag_stream_info->first_tfra_pts != AV_NOPTS_VALUE)